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

On Wed, 10 Jun 2020, Ralph Seichter via mailop wrote: * Hetzner Blacklist via mailop: For the past few years, T-Online have been moving to a system where they block all unknown IPs. [...] This statement matches what I experienced. Freshly installed mail servers (with matching SPF entries)

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

Yep, T-Online finally just confirmed this for me a bit ago. Cheers, Al Iverson On Wed, Jun 10, 2020 at 12:57 PM Ralph Seichter via mailop wrote: > > * Hetzner Blacklist via mailop: > > > For the past few years, T-Online have been moving to a system where > > they block all unknown IPs. [...] >

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

On Wed, 10 Jun 2020 09:29:18 -0500, Al Iverson via mailop wrote: >Likely because I included your IP in a list of examples I sent them. >They replied overnight saying they'd unblock. Even though that's not >really what I was asking for. Ah. Thanks for your efforts. I had briefly entertained

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

* Hetzner Blacklist via mailop: > For the past few years, T-Online have been moving to a system where > they block all unknown IPs. [...] This statement matches what I experienced. Freshly installed mail servers (with matching SPF entries) were unable to send email to T-Online until I contacted

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

Likely because I included your IP in a list of examples I sent them. They replied overnight saying they'd unblock. Even though that's not really what I was asking for. Didn't really answer my questions about a misconfiguration or broad blocking. It does seem as though they just decided to block

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

On Wed, 10 Jun 2020 10:43:21 +0100, Graeme Fowler via mailop wrote: >I thought I'd do a check on this assertion and it does appear to be accurate. I did not contact them (nobody here sends mail in that direction, in any event) but just now I get 220 rather than 554. mdr -- My study of life

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

to get it fixed.  In the mean time, your customers emails are being permanently rejected   Then, I guess they’re free to run their mail system however they choose ... ☹   Jon Morby www.fido.net     From: Mark Dale via mailop Sent: 10 June 2020 11:27 To: mailop@mailop.org Subject: Re: [mailop] t

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

Auftrag von Jaroslaw Rafa via mailop Gesendet: Mittwoch, 10. Juni 2020 11:45 An: Bill Cole via mailop Betreff: Re: [mailop] t-online.de outage? This email has reached Mapp via an external source Dnia 9.06.2020 o godz. 19:32:27 Bill Cole via mailop pisze: > > $ telnet mx01.t-online

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

On Wed, 2020-06-10 at 11:20 +0200, Hetzner Blacklist via mailop wrote: > As far as I know this isn't a bug, it's a feature. > > For the past few years, T-Online have been moving to a system where they > block all unknown IPs. How exactly they define that is not 100% clear, > but it seems to be

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

Dnia 9.06.2020 o godz. 19:32:27 Bill Cole via mailop pisze: > > $ 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

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

On 10 Jun 2020, at 10:20, Hetzner Blacklist via mailop wrote: > As far as I know this isn't a bug, it's a feature. Joy. > For the past few years, T-Online have been moving to a system where they > block all unknown IPs. How exactly they define that is not 100% clear, > but it seems to be any

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

As far as I know this isn't a bug, it's a feature. For the past few years, T-Online have been moving to a system where they block all unknown IPs. How exactly they define that is not 100% clear, but it seems to be any IPs that haven't recently sent them email. So if an IP hasn't sent them email

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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,

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

: 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 <mailto:ja...@mailkit.com> Tel: +4

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

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

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

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

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

er for help or to contact t...@rx.t-online.de > <mailto:t...@rx.t-online.de> to clarify.) (BL) > >   > > ☹ > >   > > Jon Morby > > www.fido.net <http://www.fido.net> > >   > >   > > *From: *Michael Peddemors via mailop <mailto:mailop@mailop.o

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

> > 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

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

: 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

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

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

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)

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

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

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

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

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

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

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

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

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

* Michael Rathbun via mailop: > After a telnet to an MX there, I see > >> 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

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

On Mon, 8 Jun 2020 21:53:06 + (UTC), Jon Morby via mailop wrote: >We just get a 554 after connect and before any handshake. I’ve tried this from >various IPs, not just our mail server IPs in AS8282 It's not just you. After a telnet to an MX there, I see >554 IP=47.190.44.19 - A problem

[mailop] t-online.de outage?

We’re currently experiencing problems connecting to any / all of t-online.de’s MXs We just get a 554 after connect and before any handshake. I’ve tried this from various IPs, not just our mail server IPs in AS8282 Anyone aware of an outage or have a contact there that can shed some light? –