Re: [mailop] t-online.de outage?

[Bill Cole via mailop]

On 9 Jun 2020, at 12:13, Al Iverson via mailop wrote:

Thanks. I sent them a note myself, for what little good it'll do right 
now.


I included the sending IPs mentioned here, just to help give them 
examples.


Anybody else who is bored, feel free to share your telnet test
results, It'll be good to have more data to share.


$ telnet mx01.t-online.de 25
Trying 194.25.134.72...
Connected to mx01.t-online.de.
Escape character is '^]'.
554 IP=67.149.19.3 - A problem occurred. (Ask your postmaster for help 
or to contact t...@rx.t-online.de to clarify.) (BL)

Connection closed by foreign host.


If they are indeed using the MultiRBL.Valli.org checker they clearly do 
not understand what that public nuisance is.


FWIW: Somehow that IP has been listed by both nodes of drbl.gremlin.ru 
for many years, supposedly because of a spamtrap hit, which is 
extraordinarily unlikely. Since the link for removal is broken and this 
is the first time I've ever seen anyone care about it, I gave up years 
ago trying to figure it out or fix it.


--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not For Hire (currently)

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Re: [mailop] t-online.de outage?

[John Capo via mailop]

On Tue, June 9, 2020 08:30, Jon Morby \(Fido\) via mailop wrote:
> Well they've responded, but weren't very helpful ... I don't think they
> see a problem :(

I don't doubt that.  They blocked my new IP space because my unassigned, 
unused, not pingable, nobody home yet addresses did not have a reverse name 
format that they approved of.

> It certainly looks like a misconfiguration to me tbh

Ditto.

> Michael Rathbun via mailop wrote on 09/06/2020 03:59:
>
>> On Tue, 09 Jun 2020 04:35:40 +0200, Ralph Seichter via mailop
>>  wrote:
>>
>>
> 554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for
> help or to contact t...@rx.t-online.de to clarify.) (BL) Connection 
> closed by foreign host.
>
>>> I remember seeing this particular error code when setting up new mail
>>> servers with IPs that have not previously sent mail to T-Online MXs. In 
>>> these cases I e-mailed
>>> the listed address and T-Online staff manually cleared the addresses. Thus, 
>>> my guess is that
>>> some T-Online blocking mechanism is currently out of whack.
>> The address quoted, and the string "(BL)" does suggest that a blocking
>> mechanism has wandered off into the weeds.
>>
>> mdr
>
>
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>
>



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Re: [mailop] t-online.de outage?

[Jon Morby (Fido) via mailop]

It looks like whatever the problem was, they’ve fixed it – at least for us
 
Thanks guys
 
 
Jon Morby
www.fido.net
 
 
From: Luis E. Muñoz via mailop
Sent: 09 June 2020 17:37
To: mailop@mailop.org
Subject: Re: [mailop] t-online.de outage?
 




On 9 Jun 2020, at 9:13, Michael Peddemors via mailop wrote:

> Hehehe.. testing from a Digital Ocean IP might NOT be the best ..

You would be surprised.

> Maybe they using GEO IP blocking UNLESS on an internal whitelist?
> Usually only see that on IPv6 ports, but maybe that is what we are 
> looking at?
>
> Need more tests from european IP(s)..

AWS machines provisioned in UK do get past the HELO.

Best regards

-lem

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Re: [mailop] t-online.de outage?

[John Levine via mailop]

In article <73D3981A-7093-4B6F-B2D0-4F93D6201716@lem.click>,
Luis E. Muñoz via mailop  wrote:
>Same here on an IPv4 allocated from Digital Ocean NY1 location. I don't 
>think this host has sent a single piece of email to those servers in at 
>least a couple months.

DO gushes spam so I wouldn't be surprised if they blocked the
whole range.  I do.



-- 
Regards,
John Levine, jo...@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly


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Re: [mailop] t-online.de outage?

[Luis E. Muñoz via mailop]

On 9 Jun 2020, at 9:13, Michael Peddemors via mailop wrote:


Hehehe.. testing from a Digital Ocean IP might NOT be the best ..


You would be surprised.


Maybe they using GEO IP blocking UNLESS on an internal whitelist?
Usually only see that on IPv6 ports, but maybe that is what we are 
looking at?


Need more tests from european IP(s)..


AWS machines provisioned in UK do get past the HELO.

Best regards

-lem

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[mailop] [OFFLIST] For the record..

[Michael Peddemors via mailop]

Working example..

telnet mx01.t-online.de 25
Trying 194.25.134.72...
Connected to mx01.t-online.de.
Escape character is '^]'.
220-mailin82.aul.t-online.de T-Online ESMTP receiver fssmtpd2025 ready.
220 T-Online ESMTP receiver ready.
QUIT
221-2.0.0 mailin82.aul.t-online.de closing.
221 2.0.0 Closing.
Connection closed by foreign host.

From same data center but a real email server cluster..
Looks like they might be using aggressive RBL checks, but exempting 
known whitelisted servers somehow?


Also, try from servers with 'mail' in the PTR record.. just a theory



--
"Catch the Magic of Linux..."

Michael Peddemors, President/CEO LinuxMagic Inc.
Visit us at http://www.linuxmagic.com @linuxmagic
A Wizard IT Company - For More Info http://www.wizard.ca
"LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd.

604-682-0300 Beautiful British Columbia, Canada

This email and any electronic data contained are confidential and intended
solely for the use of the individual or entity to which they are addressed.
Please note that any views or opinions presented in this email are solely
those of the author and are not intended to represent those of the company.

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Re: [mailop] t-online.de outage?

[Simplelists - Andrew Beverley via mailop]

On Tue, 9 Jun 2020 11:13:34 -0500 Al Iverson via mailop wrote:
> Anybody else who is bored, feel free to share your telnet test
> results

From the very same server, I get different results depending on which
local IP address I bind to. If I bind to an IP address which regularly
sends email (89.16.184.172) then it connects fine, but if I connect
from an IP address that never normally sends email (89.16.162.4), then I
get the same error message that others are reporting.

Andy

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Re: [mailop] t-online.de outage?

[Michael Peddemors via mailop]

Hehehe.. testing from a Digital Ocean IP might NOT be the best ..

But anyone getting a sense from the reports so far that this might be 
GEO IP restrictions at the edge?


Maybe they using GEO IP blocking UNLESS on an internal whitelist?
Usually only see that on IPv6 ports, but maybe that is what we are 
looking at?


Need more tests from european IP(s)..

On 2020-06-09 9:03 a.m., Luis E. Muñoz via mailop wrote:



On 9 Jun 2020, at 8:40, Jon Morby (Fido) via mailop wrote:

The forward and reverse on our mail servers matches  one of my 
test boxes (on my home network) was new and didn’t have matching 
reverse, but that the other machines I’ve tried from all have matching 
forward/reverse and they’re still being rejected before EHLO / etc


For example (and the actual IP that’s experiencing issues)

[root@ns1 ~]# host 80.252.116.10
10.116.252.80.in-addr.arpa domain name pointer mail-1-116-10.fido.net.
[root@ns1 ~]# host  mail-1-116-10.fido.net.
mail-1-116-10.fido.net has address 80.252.116.10

Status: 5.0.0Remote-MTA: dns; mx01.t-online.deDiagnostic-Code: smtp; 
554 IP=80.252.116.10 - A problem occurred. (Ask your postmaster for 
help or to contact t...@rx.t-online.de to clarify.) (BL)


Same here on an IPv4 allocated from Digital Ocean NY1 location. I don't 
think this host has sent a single piece of email to those servers in at 
least a couple months.


Best regards

-lem

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--
"Catch the Magic of Linux..."

Michael Peddemors, President/CEO LinuxMagic Inc.
Visit us at http://www.linuxmagic.com @linuxmagic
A Wizard IT Company - For More Info http://www.wizard.ca
"LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd.

604-682-0300 Beautiful British Columbia, Canada

This email and any electronic data contained are confidential and intended
solely for the use of the individual or entity to which they are addressed.
Please note that any views or opinions presented in this email are solely
those of the author and are not intended to represent those of the company.

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Re: [mailop] t-online.de outage?

[Al Iverson via mailop]

Thanks. I sent them a note myself, for what little good it'll do right now.

I included the sending IPs mentioned here, just to help give them examples.

Anybody else who is bored, feel free to share your telnet test
results, It'll be good to have more data to share.

Cheers,
Al Iverson

On Tue, Jun 9, 2020 at 11:07 AM Mark Fletcher via mailop
 wrote:
>
> Working here:
>
> $ telnet mx01.t-online.de 25
> Trying 194.25.134.72...
> Connected to mx01.t-online.de.
> Escape character is '^]'.
> 220-mailin71.aul.t-online.de T-Online ESMTP receiver fssmtpd2025 ready.
> 220 T-Online ESMTP receiver ready.
> quit
> 221-2.0.0 mailin71.aul.t-online.de closing.
> 221 2.0.0 Closing.
> Connection closed by foreign host.
>
>
> Mark
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-- 
Al Iverson // Wombatmail // Chicago
Song a day! https://www.wombatmail.com
Deliverability! https://spamresource.com
And DNS Tools too! https://xnnd.com

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Re: [mailop] t-online.de outage?

[Jon Morby (Fido) via mailop]

I did contact the supplied email address ...
 
They weren’t overly helpful ... I’ve provided more info and am still waiting 
for a response ... it doesn’t appear to be an issue with our setup though, at 
least as far as I can tell.
 
 
Jon Morby
www.fido.net
 
 
From: Jakub Olexa via mailop
Sent: 09 June 2020 17:06
To: mailop@mailop.org
Subject: Re: [mailop] t-online.de outage?
 


I guess following the guidance would not hurt - contact the email
mentioned. Could be something routing related?

Jakub Olexa
Founder & CEO
E-mail: ja...@mailkit.com 
Tel: +420 777 744 440 

Mailkit - Closing the circle between Deliverability and Engagement


On 9.6.2020 17:40, Jon Morby (Fido) via mailop wrote:
>
> The forward and reverse on our mail servers matches  one of my
> test boxes (on my home network) was new and didn’t have matching
> reverse, but that the other machines I’ve tried from all have matching
> forward/reverse and they’re still being rejected before EHLO / etc
>
>  
>
> For example (and the actual IP that’s experiencing issues)
>
>  
>
> [root@ns1 ~]# host 80.252.116.10
>
> 10.116.252.80.in-addr.arpa domain name pointer mail-1-116-10.fido.net.
>
> [root@ns1 ~]# host  mail-1-116-10.fido.net.
>
> mail-1-116-10.fido.net has address 80.252.116.10
>
>  
>
> Status: 5.0.0
> Remote-MTA: dns; mx01.t-online.de
> Diagnostic-Code: smtp; 554 IP=80.252.116.10 - A problem occurred. (Ask your 
> postmaster for help or to contact t...@rx.t-online.de 
>  to clarify.) (BL)
>
>  
>
> ☹
>
>  
>
> Jon Morby
>
> www.fido.net 
>
>  
>
>  
>
> *From: *Michael Peddemors via mailop 
> *Sent: *09 June 2020 16:10
> *To: *mailop@mailop.org 
> *Subject: *Re: [mailop] t-online.de outage?
>
>  
>
>
> From a static IP with a properly aligned A <<>> PTR..
>
> telnet mx01..t-online.de 25
> Trying 194.25.134.72...
> Connected to mx01.t-online.de.
> Escape character is '^]'.
> 554 IP=104.128.144.8 - A problem occurred. (Ask your postmaster for help
> or to contact t...@rx.t-online.de to clarify.) (BL)
> Connection closed by foreign host.
>
>
> On 2020-06-09 7:55 a.m., Al Iverson via mailop wrote:
> > I'm getting that same error here.
> >
> > telnet mx01.t-online.de 25
> > Trying 194.25.134.72...
> > Connected to mx01.t-online.de.
> > Escape character is '^]'.
> > 554 IP=206.125.175.2 - A problem occurred. (Ask your postmaster for
> > help or to contact t...@rx.t-online.de to clarify.) (BL)
> > Connection closed by foreign host.
> >
> > I'm calling it broken, not intentional. I put a notice up on my Spam
> > Resource blog and Twitter.
> >
> > To all doing a telnet test (from a non-dynamic IP), is anyone NOT
> > getting that 554 error?
> >
> > Cheers,
> > Al Iverson
> >
> > On Tue, Jun 9, 2020 at 9:49 AM Michael Peddemors via mailop
> >  wrote:
> >>
> >> We also had a problem with them (One of our ISP email clusters) , a
> case
> >> where we had two (2) PTR records, and two A Records, but either their
> >> lookup, or their 3rd party tools weren't smart enough to check each
> >> entry to find a A <<>> PTR match...
> >>
> >> When contacted, they responded by saying that 'any' flag on the
> >> MULTIVALLI listing tool would prevent delisting..
> >>
> >> Yeah, it looks like they went overly aggressive, not sure if they use
> >> home grown tools, or a 3rd party though..
> >>
> >> So you MIGHT want to check A <<>> PTR alignment, might be what they are
> >> using..
> >>
> >>
> >>
> >> On 2020-06-09 5:30 a.m., Jon Morby (Fido) via mailop wrote:
> >>> Well they've responded, but weren't very helpful ... I don't think
> they
> >>> see a problem :(
> >>>
> >>> It certainly looks like a misconfiguration to me tbh
> >>>
> >>> Michael Rathbun via mailop wrote on 09/06/2020 03:59:
>  On Tue, 09 Jun 2020 04:35:40 +0200, Ralph Seichter via mailop
>   wrote:
> 
> >>> 554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for
> >>> help or to contact t...@rx.t-online.de to clarify.) (BL)
> Connection
> >>> closed by foreign host.
> > I remember seeing this particular error code when setting up new
> mail
> > servers with IPs that have not previously sent mail to T-Online
> MXs. In
> > these cases I e-mailed the listed address and T-Online staff
> manually
> > cleared the addresses. Thus, my guess is that some T-Online blocking
> > mechanism is currently out of whack.
>  The address quoted, and the string "(BL)" does suggest that a
> blocking
>  mechanism has wandered off into the weeds.
> 
>  mdr
> >>>
> >>>
> >>> ___
> >>> mailop mailing list
> >>> mailop@mailop.org
> >>> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
> >>
> >>
> >>
> >> --
> >> "Catch the Magic of Linux..."
> >>
> 
> >> Michael Peddemors, President/

Re: [mailop] t-online.de outage?

[Luis E. Muñoz via mailop]

On 9 Jun 2020, at 8:40, Jon Morby (Fido) via mailop wrote:

The forward and reverse on our mail servers matches  one of my 
test boxes (on my home network) was new and didn’t have matching 
reverse, but that the other machines I’ve tried from all have 
matching forward/reverse and they’re still being rejected before 
EHLO / etc

 
For example (and the actual IP that’s experiencing issues)
 
[root@ns1 ~]# host 80.252.116.10
10.116.252.80.in-addr.arpa domain name pointer mail-1-116-10.fido.net.
[root@ns1 ~]# host  mail-1-116-10.fido.net.
mail-1-116-10.fido.net has address 80.252.116.10
 
Status: 5.0.0Remote-MTA: dns; mx01.t-online.deDiagnostic-Code: smtp; 
554 IP=80.252.116.10 - A problem occurred. (Ask your postmaster for 
help or to contact t...@rx.t-online.de to clarify.) (BL) 


Same here on an IPv4 allocated from Digital Ocean NY1 location. I don't 
think this host has sent a single piece of email to those servers in at 
least a couple months.


Best regards

-lem

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Re: [mailop] t-online.de outage?

[Mark Fletcher via mailop]

Working here:

$ telnet mx01.t-online.de 25
Trying 194.25.134.72...
Connected to mx01.t-online.de.
Escape character is '^]'.
220-mailin71.aul.t-online.de T-Online ESMTP receiver fssmtpd2025 ready.
220 T-Online ESMTP receiver ready.
quit
221-2.0.0 mailin71.aul.t-online.de closing.
221 2.0.0 Closing.
Connection closed by foreign host.


Mark
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Re: [mailop] Anyone from Cox around?

[Michael Ellis via mailop]

Nobody from Cox around?

 

From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Michael Ellis
via mailop
Sent: Friday, May 29, 2020 12:23 PM
To: mailop@mailop.org
Subject: [mailop] Anyone from Cox around?

 

 

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Re: [mailop] t-online.de outage?

[Jakub Olexa via mailop]

I guess following the guidance would not hurt - contact the email
mentioned. Could be something routing related?

Jakub Olexa
Founder & CEO
E-mail: ja...@mailkit.com 
Tel: +420 777 744 440 

Mailkit - Closing the circle between Deliverability and Engagement


On 9.6.2020 17:40, Jon Morby (Fido) via mailop wrote:
>
> The forward and reverse on our mail servers matches  one of my
> test boxes (on my home network) was new and didn’t have matching
> reverse, but that the other machines I’ve tried from all have matching
> forward/reverse and they’re still being rejected before EHLO / etc
>
>  
>
> For example (and the actual IP that’s experiencing issues)
>
>  
>
> [root@ns1 ~]# host 80.252.116.10
>
> 10.116.252.80.in-addr.arpa domain name pointer mail-1-116-10.fido.net.
>
> [root@ns1 ~]# host  mail-1-116-10.fido.net.
>
> mail-1-116-10.fido.net has address 80.252.116.10
>
>  
>
> Status: 5.0.0
> Remote-MTA: dns; mx01.t-online.de
> Diagnostic-Code: smtp; 554 IP=80.252.116.10 - A problem occurred. (Ask your 
> postmaster for help or to contact t...@rx.t-online.de 
>  to clarify.) (BL)
>
>  
>
> ☹
>
>  
>
> Jon Morby
>
> www.fido.net 
>
>  
>
>  
>
> *From: *Michael Peddemors via mailop 
> *Sent: *09 June 2020 16:10
> *To: *mailop@mailop.org 
> *Subject: *Re: [mailop] t-online.de outage?
>
>  
>
>
> From a static IP with a properly aligned A <<>> PTR..
>
> telnet mx01..t-online.de 25
> Trying 194.25.134.72...
> Connected to mx01.t-online.de.
> Escape character is '^]'.
> 554 IP=104.128.144.8 - A problem occurred. (Ask your postmaster for help
> or to contact t...@rx.t-online.de to clarify.) (BL)
> Connection closed by foreign host.
>
>
> On 2020-06-09 7:55 a.m., Al Iverson via mailop wrote:
> > I'm getting that same error here.
> >
> > telnet mx01.t-online.de 25
> > Trying 194.25.134.72...
> > Connected to mx01.t-online.de.
> > Escape character is '^]'.
> > 554 IP=206.125.175.2 - A problem occurred. (Ask your postmaster for
> > help or to contact t...@rx.t-online.de to clarify.) (BL)
> > Connection closed by foreign host.
> >
> > I'm calling it broken, not intentional. I put a notice up on my Spam
> > Resource blog and Twitter.
> >
> > To all doing a telnet test (from a non-dynamic IP), is anyone NOT
> > getting that 554 error?
> >
> > Cheers,
> > Al Iverson
> >
> > On Tue, Jun 9, 2020 at 9:49 AM Michael Peddemors via mailop
> >  wrote:
> >>
> >> We also had a problem with them (One of our ISP email clusters) , a
> case
> >> where we had two (2) PTR records, and two A Records, but either their
> >> lookup, or their 3rd party tools weren't smart enough to check each
> >> entry to find a A <<>> PTR match...
> >>
> >> When contacted, they responded by saying that 'any' flag on the
> >> MULTIVALLI listing tool would prevent delisting..
> >>
> >> Yeah, it looks like they went overly aggressive, not sure if they use
> >> home grown tools, or a 3rd party though..
> >>
> >> So you MIGHT want to check A <<>> PTR alignment, might be what they are
> >> using..
> >>
> >>
> >>
> >> On 2020-06-09 5:30 a.m., Jon Morby (Fido) via mailop wrote:
> >>> Well they've responded, but weren't very helpful ... I don't think
> they
> >>> see a problem :(
> >>>
> >>> It certainly looks like a misconfiguration to me tbh
> >>>
> >>> Michael Rathbun via mailop wrote on 09/06/2020 03:59:
>  On Tue, 09 Jun 2020 04:35:40 +0200, Ralph Seichter via mailop
>   wrote:
> 
> >>> 554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for
> >>> help or to contact t...@rx.t-online.de to clarify.) (BL)
> Connection
> >>> closed by foreign host.
> > I remember seeing this particular error code when setting up new
> mail
> > servers with IPs that have not previously sent mail to T-Online
> MXs. In
> > these cases I e-mailed the listed address and T-Online staff
> manually
> > cleared the addresses. Thus, my guess is that some T-Online blocking
> > mechanism is currently out of whack.
>  The address quoted, and the string "(BL)" does suggest that a
> blocking
>  mechanism has wandered off into the weeds.
> 
>  mdr
> >>>
> >>>
> >>> ___
> >>> mailop mailing list
> >>> mailop@mailop.org
> >>> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
> >>
> >>
> >>
> >> --
> >> "Catch the Magic of Linux..."
> >>
> 
> >> Michael Peddemors, President/CEO LinuxMagic Inc.
> >> Visit us at http://www.linuxmagic.com @linuxmagic
> >> A Wizard IT Company - For More Info http://www.wizard.ca
> >> "LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd.
> >>
> 
> >> 604-682-0300 Beautiful British Columbia, Canada
> >>
> >> This email and any electroni

Re: [mailop] t-online.de outage?

[lukn via mailop]

>
> To all doing a telnet test (from a non-dynamic IP), is anyone NOT
> getting that 554 error?
$ telnet mx01.t-online.de 25
Trying 194.25.134.72...
Connected to mx01.t-online.de.
Escape character is '^]'.
220-mailin85.aul.t-online.de T-Online ESMTP receiver fssmtpd2025 ready.
220 T-Online ESMTP receiver ready.
Connection closed by foreign host.

The connection closes after ~5 seconds of inactivity.

This is from two properly configured mail servers with previous mailing
history to t-offline. Both are located in central Europe.

I had less luck from my residential line and VPS in various other
(central European) locations.

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Re: [mailop] t-online.de outage?

[Jon Morby (Fido) via mailop]

The forward and reverse on our mail servers matches  one of my test boxes 
(on my home network) was new and didn’t have matching reverse, but that the 
other machines I’ve tried from all have matching forward/reverse and they’re 
still being rejected before EHLO / etc
 
For example (and the actual IP that’s experiencing issues)
 
[root@ns1 ~]# host 80.252.116.10
10.116.252.80.in-addr.arpa domain name pointer mail-1-116-10.fido.net.
[root@ns1 ~]# host  mail-1-116-10.fido.net.
mail-1-116-10.fido.net has address 80.252.116.10
 
Status: 5.0.0Remote-MTA: dns; mx01.t-online.deDiagnostic-Code: smtp; 554 
IP=80.252.116.10 - A problem occurred. (Ask your postmaster for help or to 
contact t...@rx.t-online.de to clarify.) (BL) 
☹
 
Jon Morby
www.fido.net
 
 
From: Michael Peddemors via mailop
Sent: 09 June 2020 16:10
To: mailop@mailop.org
Subject: Re: [mailop] t-online.de outage?
 


 From a static IP with a properly aligned A <<>> PTR..

  telnet mx01..t-online.de 25
Trying 194.25.134.72...
Connected to mx01.t-online.de.
Escape character is '^]'.
554 IP=104.128.144.8 - A problem occurred. (Ask your postmaster for help 
or to contact t...@rx.t-online.de to clarify.) (BL)
Connection closed by foreign host.


On 2020-06-09 7:55 a.m., Al Iverson via mailop wrote:
> I'm getting that same error here.
> 
> telnet mx01.t-online.de 25
> Trying 194.25.134.72...
> Connected to mx01.t-online.de.
> Escape character is '^]'.
> 554 IP=206.125.175.2 - A problem occurred. (Ask your postmaster for
> help or to contact t...@rx.t-online.de to clarify.) (BL)
> Connection closed by foreign host.
> 
> I'm calling it broken, not intentional. I put a notice up on my Spam
> Resource blog and Twitter.
> 
> To all doing a telnet test (from a non-dynamic IP), is anyone NOT
> getting that 554 error?
> 
> Cheers,
> Al Iverson
> 
> On Tue, Jun 9, 2020 at 9:49 AM Michael Peddemors via mailop
>  wrote:
>>
>> We also had a problem with them (One of our ISP email clusters) , a case
>> where we had two (2) PTR records, and two A Records, but either their
>> lookup, or their 3rd party tools weren't smart enough to check each
>> entry to find a A <<>> PTR match...
>>
>> When contacted, they responded by saying that 'any' flag on the
>> MULTIVALLI listing tool would prevent delisting..
>>
>> Yeah, it looks like they went overly aggressive, not sure if they use
>> home grown tools, or a 3rd party though..
>>
>> So you MIGHT want to check A <<>> PTR alignment, might be what they are
>> using..
>>
>>
>>
>> On 2020-06-09 5:30 a.m., Jon Morby (Fido) via mailop wrote:
>>> Well they've responded, but weren't very helpful ... I don't think they
>>> see a problem :(
>>>
>>> It certainly looks like a misconfiguration to me tbh
>>>
>>> Michael Rathbun via mailop wrote on 09/06/2020 03:59:
 On Tue, 09 Jun 2020 04:35:40 +0200, Ralph Seichter via mailop
  wrote:

>>> 554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for
>>> help or to contact t...@rx.t-online.de to clarify.) (BL) Connection
>>> closed by foreign host.
> I remember seeing this particular error code when setting up new mail
> servers with IPs that have not previously sent mail to T-Online MXs. In
> these cases I e-mailed the listed address and T-Online staff manually
> cleared the addresses. Thus, my guess is that some T-Online blocking
> mechanism is currently out of whack.
 The address quoted, and the string "(BL)" does suggest that a blocking
 mechanism has wandered off into the weeds.

 mdr
>>>
>>>
>>> ___
>>> mailop mailing list
>>> mailop@mailop.org
>>> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
>>
>>
>>
>> --
>> "Catch the Magic of Linux..."
>> 
>> Michael Peddemors, President/CEO LinuxMagic Inc.
>> Visit us at http://www.linuxmagic.com @linuxmagic
>> A Wizard IT Company - For More Info http://www.wizard.ca
>> "LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd.
>> 
>> 604-682-0300 Beautiful British Columbia, Canada
>>
>> This email and any electronic data contained are confidential and intended
>> solely for the use of the individual or entity to which they are addressed.
>> Please note that any views or opinions presented in this email are solely
>> those of the author and are not intended to represent those of the company.
>>
>> ___
>> mailop mailing list
>> mailop@mailop.org
>> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
> 
> 
> 



-- 
"Catch the Magic of Linux..."

Michael Peddemors, President/CEO LinuxMagic Inc.
Visit us at http://www.linuxmagic.com @linuxmagic
A Wizard IT Company - For More Info http://www.wizard.ca
"LinuxMagic" a Registered TradeMark of Wizard To

Re: [mailop] t-online.de outage?

[Jakub Olexa via mailop]

Hi,

strangely enough we've see only one such error in he past week and that
came from a remote bounce. Since you have already checked the rDNS my
guess is that CSA whitelisting gets us past this issue.

Jakub Olexa
Founder & CEO
E-mail: ja...@mailkit.com 
Tel: +420 777 744 440 

Mailkit - Closing the circle between Deliverability and Engagement


On 9.6.2020 17:01, Michael Peddemors via mailop wrote:
> From a static IP with a properly aligned A <<>> PTR..
>
>  telnet mx01..t-online.de 25
> Trying 194.25.134.72...
> Connected to mx01.t-online.de.
> Escape character is '^]'.
> 554 IP=104.128.144.8 - A problem occurred. (Ask your postmaster for
> help or to contact t...@rx.t-online.de to clarify.) (BL)
> Connection closed by foreign host.
>
>
> On 2020-06-09 7:55 a.m., Al Iverson via mailop wrote:
>> I'm getting that same error here.
>>
>> telnet mx01.t-online.de 25
>> Trying 194.25.134.72...
>> Connected to mx01.t-online.de.
>> Escape character is '^]'.
>> 554 IP=206.125.175.2 - A problem occurred. (Ask your postmaster for
>> help or to contact t...@rx.t-online.de to clarify.) (BL)
>> Connection closed by foreign host.
>>
>> I'm calling it broken, not intentional. I put a notice up on my Spam
>> Resource blog and Twitter.
>>
>> To all doing a telnet test (from a non-dynamic IP), is anyone NOT
>> getting that 554 error?
>>
>> Cheers,
>> Al Iverson
>>
>> On Tue, Jun 9, 2020 at 9:49 AM Michael Peddemors via mailop
>>  wrote:
>>>
>>> We also had a problem with them (One of our ISP email clusters) , a
>>> case
>>> where we had two (2) PTR records, and two A Records, but either their
>>> lookup, or their 3rd party tools weren't smart enough to check each
>>> entry to find a A <<>> PTR match...
>>>
>>> When contacted, they responded by saying that 'any' flag on the
>>> MULTIVALLI listing tool would prevent delisting..
>>>
>>> Yeah, it looks like they went overly aggressive, not sure if they use
>>> home grown tools, or a 3rd party though..
>>>
>>> So you MIGHT want to check A <<>> PTR alignment, might be what they are
>>> using..
>>>
>>>
>>>
>>> On 2020-06-09 5:30 a.m., Jon Morby (Fido) via mailop wrote:
 Well they've responded, but weren't very helpful ... I don't think
 they
 see a problem :(

 It certainly looks like a misconfiguration to me tbh

 Michael Rathbun via mailop wrote on 09/06/2020 03:59:
> On Tue, 09 Jun 2020 04:35:40 +0200, Ralph Seichter via mailop
>  wrote:
>
 554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for
 help or to contact t...@rx.t-online.de to clarify.) (BL)
 Connection
 closed by foreign host.
>> I remember seeing this particular error code when setting up new
>> mail
>> servers with IPs that have not previously sent mail to T-Online
>> MXs. In
>> these cases I e-mailed the listed address and T-Online staff
>> manually
>> cleared the addresses. Thus, my guess is that some T-Online blocking
>> mechanism is currently out of whack.
> The address quoted, and the string "(BL)" does suggest that a
> blocking
> mechanism has wandered off into the weeds.
>
> mdr


 ___
 mailop mailing list
 mailop@mailop.org
 https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
>>>
>>>
>>>
>>> -- 
>>> "Catch the Magic of Linux..."
>>> 
>>>
>>> Michael Peddemors, President/CEO LinuxMagic Inc.
>>> Visit us at http://www.linuxmagic.com @linuxmagic
>>> A Wizard IT Company - For More Info http://www.wizard.ca
>>> "LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd.
>>> 
>>>
>>> 604-682-0300 Beautiful British Columbia, Canada
>>>
>>> This email and any electronic data contained are confidential and
>>> intended
>>> solely for the use of the individual or entity to which they are
>>> addressed.
>>> Please note that any views or opinions presented in this email are
>>> solely
>>> those of the author and are not intended to represent those of the
>>> company.
>>>
>>> ___
>>> mailop mailing list
>>> mailop@mailop.org
>>> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
>>
>>
>>
>
>
>


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Re: [mailop] t-online.de outage?

[Michael Peddemors via mailop]

From a static IP with a properly aligned A <<>> PTR..

 telnet mx01..t-online.de 25
Trying 194.25.134.72...
Connected to mx01.t-online.de.
Escape character is '^]'.
554 IP=104.128.144.8 - A problem occurred. (Ask your postmaster for help 
or to contact t...@rx.t-online.de to clarify.) (BL)

Connection closed by foreign host.


On 2020-06-09 7:55 a.m., Al Iverson via mailop wrote:

I'm getting that same error here.

telnet mx01.t-online.de 25
Trying 194.25.134.72...
Connected to mx01.t-online.de.
Escape character is '^]'.
554 IP=206.125.175.2 - A problem occurred. (Ask your postmaster for
help or to contact t...@rx.t-online.de to clarify.) (BL)
Connection closed by foreign host.

I'm calling it broken, not intentional. I put a notice up on my Spam
Resource blog and Twitter.

To all doing a telnet test (from a non-dynamic IP), is anyone NOT
getting that 554 error?

Cheers,
Al Iverson

On Tue, Jun 9, 2020 at 9:49 AM Michael Peddemors via mailop
 wrote:


We also had a problem with them (One of our ISP email clusters) , a case
where we had two (2) PTR records, and two A Records, but either their
lookup, or their 3rd party tools weren't smart enough to check each
entry to find a A <<>> PTR match...

When contacted, they responded by saying that 'any' flag on the
MULTIVALLI listing tool would prevent delisting..

Yeah, it looks like they went overly aggressive, not sure if they use
home grown tools, or a 3rd party though..

So you MIGHT want to check A <<>> PTR alignment, might be what they are
using..



On 2020-06-09 5:30 a.m., Jon Morby (Fido) via mailop wrote:

Well they've responded, but weren't very helpful ... I don't think they
see a problem :(

It certainly looks like a misconfiguration to me tbh

Michael Rathbun via mailop wrote on 09/06/2020 03:59:

On Tue, 09 Jun 2020 04:35:40 +0200, Ralph Seichter via mailop
 wrote:


554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for
help or to contact t...@rx.t-online.de to clarify.) (BL) Connection
closed by foreign host.

I remember seeing this particular error code when setting up new mail
servers with IPs that have not previously sent mail to T-Online MXs. In
these cases I e-mailed the listed address and T-Online staff manually
cleared the addresses. Thus, my guess is that some T-Online blocking
mechanism is currently out of whack.

The address quoted, and the string "(BL)" does suggest that a blocking
mechanism has wandered off into the weeds.

mdr



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mailop mailing list
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--
"Catch the Magic of Linux..."

Michael Peddemors, President/CEO LinuxMagic Inc.
Visit us at http://www.linuxmagic.com @linuxmagic
A Wizard IT Company - For More Info http://www.wizard.ca
"LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd.

604-682-0300 Beautiful British Columbia, Canada

This email and any electronic data contained are confidential and intended
solely for the use of the individual or entity to which they are addressed.
Please note that any views or opinions presented in this email are solely
those of the author and are not intended to represent those of the company.

___
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https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop








--
"Catch the Magic of Linux..."

Michael Peddemors, President/CEO LinuxMagic Inc.
Visit us at http://www.linuxmagic.com @linuxmagic
A Wizard IT Company - For More Info http://www.wizard.ca
"LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd.

604-682-0300 Beautiful British Columbia, Canada

This email and any electronic data contained are confidential and intended
solely for the use of the individual or entity to which they are addressed.
Please note that any views or opinions presented in this email are solely
those of the author and are not intended to represent those of the company.

___
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mailop@mailop.org
https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop

Re: [mailop] t-online.de outage?

[Al Iverson via mailop]

I'm getting that same error here.

telnet mx01.t-online.de 25
Trying 194.25.134.72...
Connected to mx01.t-online.de.
Escape character is '^]'.
554 IP=206.125.175.2 - A problem occurred. (Ask your postmaster for
help or to contact t...@rx.t-online.de to clarify.) (BL)
Connection closed by foreign host.

I'm calling it broken, not intentional. I put a notice up on my Spam
Resource blog and Twitter.

To all doing a telnet test (from a non-dynamic IP), is anyone NOT
getting that 554 error?

Cheers,
Al Iverson

On Tue, Jun 9, 2020 at 9:49 AM Michael Peddemors via mailop
 wrote:
>
> We also had a problem with them (One of our ISP email clusters) , a case
> where we had two (2) PTR records, and two A Records, but either their
> lookup, or their 3rd party tools weren't smart enough to check each
> entry to find a A <<>> PTR match...
>
> When contacted, they responded by saying that 'any' flag on the
> MULTIVALLI listing tool would prevent delisting..
>
> Yeah, it looks like they went overly aggressive, not sure if they use
> home grown tools, or a 3rd party though..
>
> So you MIGHT want to check A <<>> PTR alignment, might be what they are
> using..
>
>
>
> On 2020-06-09 5:30 a.m., Jon Morby (Fido) via mailop wrote:
> > Well they've responded, but weren't very helpful ... I don't think they
> > see a problem :(
> >
> > It certainly looks like a misconfiguration to me tbh
> >
> > Michael Rathbun via mailop wrote on 09/06/2020 03:59:
> >> On Tue, 09 Jun 2020 04:35:40 +0200, Ralph Seichter via mailop
> >>  wrote:
> >>
> > 554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for
> > help or to contact t...@rx.t-online.de to clarify.) (BL) Connection
> > closed by foreign host.
> >>> I remember seeing this particular error code when setting up new mail
> >>> servers with IPs that have not previously sent mail to T-Online MXs. In
> >>> these cases I e-mailed the listed address and T-Online staff manually
> >>> cleared the addresses. Thus, my guess is that some T-Online blocking
> >>> mechanism is currently out of whack.
> >> The address quoted, and the string "(BL)" does suggest that a blocking
> >> mechanism has wandered off into the weeds.
> >>
> >> mdr
> >
> >
> > ___
> > mailop mailing list
> > mailop@mailop.org
> > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
>
>
>
> --
> "Catch the Magic of Linux..."
> 
> Michael Peddemors, President/CEO LinuxMagic Inc.
> Visit us at http://www.linuxmagic.com @linuxmagic
> A Wizard IT Company - For More Info http://www.wizard.ca
> "LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd.
> 
> 604-682-0300 Beautiful British Columbia, Canada
>
> This email and any electronic data contained are confidential and intended
> solely for the use of the individual or entity to which they are addressed.
> Please note that any views or opinions presented in this email are solely
> those of the author and are not intended to represent those of the company.
>
> ___
> mailop mailing list
> mailop@mailop.org
> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop



-- 
Al Iverson // Wombatmail // Chicago
Song a day! https://www.wombatmail.com
Deliverability! https://spamresource.com
And DNS Tools too! https://xnnd.com

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Re: [mailop] t-online.de outage?

[Michael Peddemors via mailop]

We also had a problem with them (One of our ISP email clusters) , a case 
where we had two (2) PTR records, and two A Records, but either their 
lookup, or their 3rd party tools weren't smart enough to check each 
entry to find a A <<>> PTR match...


When contacted, they responded by saying that 'any' flag on the 
MULTIVALLI listing tool would prevent delisting..


Yeah, it looks like they went overly aggressive, not sure if they use 
home grown tools, or a 3rd party though..


So you MIGHT want to check A <<>> PTR alignment, might be what they are 
using..




On 2020-06-09 5:30 a.m., Jon Morby (Fido) via mailop wrote:
Well they've responded, but weren't very helpful ... I don't think they 
see a problem :(


It certainly looks like a misconfiguration to me tbh

Michael Rathbun via mailop wrote on 09/06/2020 03:59:

On Tue, 09 Jun 2020 04:35:40 +0200, Ralph Seichter via mailop
 wrote:


554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for
help or to contact t...@rx.t-online.de to clarify.) (BL) Connection
closed by foreign host.

I remember seeing this particular error code when setting up new mail
servers with IPs that have not previously sent mail to T-Online MXs. In
these cases I e-mailed the listed address and T-Online staff manually
cleared the addresses. Thus, my guess is that some T-Online blocking
mechanism is currently out of whack.

The address quoted, and the string "(BL)" does suggest that a blocking
mechanism has wandered off into the weeds.

mdr



___
mailop mailing list
mailop@mailop.org
https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop




--
"Catch the Magic of Linux..."

Michael Peddemors, President/CEO LinuxMagic Inc.
Visit us at http://www.linuxmagic.com @linuxmagic
A Wizard IT Company - For More Info http://www.wizard.ca
"LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd.

604-682-0300 Beautiful British Columbia, Canada

This email and any electronic data contained are confidential and intended
solely for the use of the individual or entity to which they are addressed.
Please note that any views or opinions presented in this email are solely
those of the author and are not intended to represent those of the company.

___
mailop mailing list
mailop@mailop.org
https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop

Re: [mailop] t-online.de outage?

[Jon Morby (Fido) via mailop]

Well they've responded, but weren't very helpful ... I don't think they 
see a problem :(


It certainly looks like a misconfiguration to me tbh

Michael Rathbun via mailop wrote on 09/06/2020 03:59:

On Tue, 09 Jun 2020 04:35:40 +0200, Ralph Seichter via mailop
 wrote:


554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for
help or to contact t...@rx.t-online.de to clarify.) (BL) Connection
closed by foreign host.

I remember seeing this particular error code when setting up new mail
servers with IPs that have not previously sent mail to T-Online MXs. In
these cases I e-mailed the listed address and T-Online staff manually
cleared the addresses. Thus, my guess is that some T-Online blocking
mechanism is currently out of whack.

The address quoted, and the string "(BL)" does suggest that a blocking
mechanism has wandered off into the weeds.

mdr



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Re: [mailop] G Suite Support - Deliverability Issues

[Ken O'Driscoll via mailop]

On Mon, 2020-06-08 at 19:12 +, Kotlikov, Anna via mailop wrote:
> Hello, 
> 
> Is there anyone here I can speak to from G Suite support?  
If you are a paying G-Suite customer then you are entitled to
comprehensive support from Google, which you can access via your
dashboard or via the details on their website.
This mailing list is not a support channel for any vendor.

Ken.
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