[mailop] Maximum message size - tag along question.

2020-10-23 Thread Grant Taylor via mailop 
Do you take into account the 4/3 inflation with Base64 encoding and / or 
allow for any message body when setting the maximum message size that 
your servers allow?




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[mailop] bell.ca/bell.net contact?

2020-10-23 Thread Erwin via mailop 
Hello,

We appear to be hitting a capacity wall from one of our ranges (
15.222.16.128/25) in delivering to their servers at 184.150.200.82 and
184.150.200.210.

I reached out to postmas...@bell.ca (postmas...@bell.net bounced) at the
end of yesterday (PDT) but no response yet, so maybe here?

Sincerely,
Erwin
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Re: [mailop] Maximum message size

2020-10-23 Thread Jaroslaw Rafa via mailop 
Dnia 23.10.2020 o godz. 22:48:42 Adam Moffett via mailop pisze:
> 
> An additional argument is how much support labor is it worth to
> guide/force/teach the use of cloud storage compared to the risks of
> allowing larger emails?  One of these is things is way easier.
> Someday I may bow to the needs of ignorance because it's easier.

I always wondered, why - as it seems - noone ever tried to standardize and
get implemented Internet-wide a service that existed in the old academic
Bitnet/EARN network. In that network, each user account was associated with
two types of default inboxes: a mail inbox and a file inbox. Complementary
to the email service, which worked almost the same as Internet email (RFC822
style message format, etc.) - although it was plain text only, MIME didn't
yet exist at that time - there was another service called "sendfile", used to
send arbitrary files to the recipient. Both services used recipient's
e-mail address to send, mail messages arrived in mail inbox, and files
arrived in file inbox (which was something like a special directory in the
filesystem, and you could just copy the files from there). That was simple
to use and worked. Why nobody ever tried to write a RFC for something like
"sendfile" and implement it in MUAs?

(In one of the places I worked previously, we tried to create our own poor
man's "sendfile" replacement, by plugging a mail filter into a MTA, which
removed from submitted messages attachments larger than a certain size,
stored them on a webserver with randomly generated links, and put these
links in outgoing message instead of removed attachments. The recipient
could download the original file by clicking on a link received in the
message. That's of course a very primitive approach, as the real
implementation would have to be in the MUA).
-- 
Regards,
   Jaroslaw Rafa
   r...@rafa.eu.org
--
"In a million years, when kids go to school, they're gonna know: once there
was a Hushpuppy, and she lived with her daddy in the Bathtub."
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Re: [mailop] Maximum message size

2020-10-23 Thread Thomas Walter via mailop 


On 24.10.20 00:48, Adam Moffett via mailop wrote:
> Nail on head Brandon.
> 
> An additional argument is how much support labor is it worth to
> guide/force/teach the use of cloud storage compared to the risks of
> allowing larger emails?  One of these is things is way easier.  Someday
> I may bow to the needs of ignorance because it's easier.
I am pretty sure none of your users sends encrypted emails, do they?
Inside of a company perhaps, but between different ones? Usually not.
Explaining that is a lot more difficult than having a file exchange
system in whatever form.

(BTW still the easiest way to get an unencrypted text or unprotected zip
file is to just tell them you can't open it.)

Then there's the issue of the law defining retention times, audit
compliant storage, backups and such for business communication which
does get a lot more difficult if big files are involved.

Besides email transports not being made for file transfer, the storage
mechanisms of MUAs aren't made for big files either.

Email is for sending letters, let DHL handle the bigger boxes.

Regards,
Thomas Walter

-- 
Thomas Walter
Datenverarbeitungszentrale

FH Münster
- University of Applied Sciences -
Corrensstr. 25, Raum B 112
48149 Münster

Tel: +49 251 83 64 908
Fax: +49 251 83 64 910
www.fh-muenster.de/dvz/



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Re: [mailop] Maximum message size

2020-10-23 Thread Adam Moffett via mailop 

Nail on head Brandon.

An additional argument is how much support labor is it worth to 
guide/force/teach the use of cloud storage compared to the risks of 
allowing larger emails?  One of these is things is way easier.  Someday 
I may bow to the needs of ignorance because it's easier.


And I grudgingly admit that there's a convenience to having a document 
in your email alongside the communications related to it.  If the user 
can remember the name of a person on the email thread or some part of 
the subject or body text then they can search for the file and expect to 
find it.  Email was never intended to be a document storage/retrieval 
system, but somehow it ended up being fairly good at that at all the 
same.  I'm sure we can name eleventy-one groupware systems that cover 
this use case better, but email did it accidentally, for free, and with 
worldwide adoption and compatibility.   (BTW: *I* don't store my 
documents in my email.  I'm just saying I understand why people do)


-Adam


-- Original Message --
From: "Brandon Long via mailop" 
To: "Thomas Walter" 
Cc: "mailop" 
Sent: 10/23/2020 5:30:00 PM
Subject: Re: [mailop] Maximum message size

As much as we all may laugh at using email for these things, there are 
a bunch of benefits to it.  For example, telling someone at a company 
to use some random external service to host their potentially 
confidential material is not a great sell and probably against the 
rules at most large companies with security policies.  It also doesn't 
require everyone to get new logins or share urls that have no ACLs.


We've long had a request from enterprise for larger sizes, even though 
we also have Drive and our email apps push you to sharing large files 
via drive.  CAD files, genetic files, in-progress videos for ads and 
such, there's a lot of things that people would rather use.  Heck, 
sharing photos via email is still very popular, and as their sizes 
increase there's going to be more pressure for larger message sizes.


I agree that Email as a protocol may not be best for larger messages... 
but the fact that the users want it isn't wrong either.


Brandon

On Fri, Oct 23, 2020 at 2:21 PM Thomas Walter via mailop 
 wrote:



On 23.10.20 22:51, Jay Hennigan via mailop wrote:
> Perhaps someone should come up with a protocol designed to transfer
> files. They could name it File Transfer Protocol and abbreviate it 
FTP.


I'd prefer something with "Secure" in it's name though, preferably in
the front, so it shows the importance of it.

Regards,
Thomas Walter

--
Thomas Walter
Datenverarbeitungszentrale

FH Münster
- University of Applied Sciences -
Corrensstr. 25, Raum B 112
48149 Münster

Tel: +49 251 83 64 908
Fax: +49 251 83 64 910
www.fh-muenster.de/dvz/

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Re: [mailop] Maximum message size

2020-10-23 Thread Brandon Long via mailop 
As much as we all may laugh at using email for these things, there are a
bunch of benefits to it.  For example, telling someone at a company to use
some random external service to host their potentially confidential
material is not a great sell and probably against the rules at most large
companies with security policies.  It also doesn't require everyone to get
new logins or share urls that have no ACLs.

We've long had a request from enterprise for larger sizes, even though we
also have Drive and our email apps push you to sharing large files via
drive.  CAD files, genetic files, in-progress videos for ads and such,
there's a lot of things that people would rather use.  Heck, sharing photos
via email is still very popular, and as their sizes increase there's going
to be more pressure for larger message sizes.

I agree that Email as a protocol may not be best for larger messages... but
the fact that the users want it isn't wrong either.

Brandon

On Fri, Oct 23, 2020 at 2:21 PM Thomas Walter via mailop 
wrote:

>
>
> On 23.10.20 22:51, Jay Hennigan via mailop wrote:
> > Perhaps someone should come up with a protocol designed to transfer
> > files. They could name it File Transfer Protocol and abbreviate it FTP.
>
> I'd prefer something with "Secure" in it's name though, preferably in
> the front, so it shows the importance of it.
>
> Regards,
> Thomas Walter
>
> --
> Thomas Walter
> Datenverarbeitungszentrale
>
> FH Münster
> - University of Applied Sciences -
> Corrensstr. 25, Raum B 112
> 48149 Münster
>
> Tel: +49 251 83 64 908 <+49%20251%208364908>
> Fax: +49 251 83 64 910 <+49%20251%208364910>
> www.fh-muenster.de/dvz/
>
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Re: [mailop] Maximum message size

2020-10-23 Thread L. Mark Stone via mailop 
We use 100MB max message size, have customers who routinely send messages with 
attachments approaching that limit, and only rarely do we see a message 
rejected due to it being too large. 

Hope that helps, 
Mark 
___ 
L. Mark Stone, Founder 

North America's Leading Zimbra VAR/BSP/Training Partner 
For Companies With Mission-Critical Email Needs 
Need more email security & compliance? Ask me about Mimecast! 



From: "Suresh Ramasubramanian via mailop"  
To: "Adam Moffett" , mailop@mailop.org 
Sent: Friday, October 23, 2020 1:51:08 PM 
Subject: Re: [mailop] Maximum message size 

Most if not all places ask that you use a file sharing solution - google drive, 
box etc for large files. 

--srs 

From: mailop  on behalf of Adam Moffett via mailop 
 
Sent: Friday, October 23, 2020 11:17:00 PM 
To: mailop@mailop.org  
Subject: Re: [mailop] Maximum message size 
Yes, it was set to 200MB years ago by request of an engineer sending CAD files. 
Now I have someone else who wants it larger. 

Meanwhile I have found in Google searching that GMail allows 25MB and I believe 
O365 is 150MB max. 

My initial impulse was to say no to this request because I'm aware of the DOS 
possibilities with large email sizes, but I thought I'd ask the community to 
see if I'm behind the times on what we think is too large. 



-- Original Message -- 
From: "Suresh Ramasubramanian" < [ mailto:ops.li...@gmail.com | 
ops.li...@gmail.com ] > 
To: "Adam Moffett" < [ mailto:a...@plexicomm.net | a...@plexicomm.net ] >; " [ 
mailto:mailop@mailop.org | mailop@mailop.org ] " < [ mailto:mailop@mailop.org | 
mailop@mailop.org ] > 
Sent: 10/23/2020 1:39:06 PM 
Subject: Re: [mailop] Maximum message size 




How many providers are going to accept 200 mb emails if you enable this and 
someone then tries to send one out? 

--srs 

From: mailop < [ mailto:mailop-boun...@mailop.org | mailop-boun...@mailop.org ] 
> on behalf of Adam Moffett via mailop < [ mailto:mailop@mailop.org | 
mailop@mailop.org ] > 
Sent: Friday, October 23, 2020 10:53:51 PM 
To: [ mailto:mailop@mailop.org | mailop@mailop.org ] < [ 
mailto:mailop@mailop.org | mailop@mailop.org ] > 
Subject: [mailop] Maximum message size 
I'm at 200MB maximum message size and have someone requesting we increase that 
limit. 

Is there any current consensus on what it should be? 


-- Adam Moffett, Network Engineer 
Plexicomm - Internet Solutions | [ 
https://mail.missioncriticalemail.com/www.plexicomm.net | www.plexicomm.net ] 
Office: 1.866.759.4678 x104 





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Re: [mailop] Maximum message size

2020-10-23 Thread Suresh Ramasubramanian via mailop 
Most if not all places ask that you use a file sharing solution - google drive, 
box etc for large files.

--srs

From: mailop  on behalf of Adam Moffett via mailop 

Sent: Friday, October 23, 2020 11:17:00 PM
To: mailop@mailop.org 
Subject: Re: [mailop] Maximum message size

Yes, it was set to 200MB years ago by request of an engineer sending CAD files.
Now I have someone else who wants it larger.

Meanwhile I have found in Google searching that GMail allows 25MB and I believe 
O365 is 150MB max.

My initial impulse was to say no to this request because I'm aware of the DOS 
possibilities with large email sizes, but I thought I'd ask the community to 
see if I'm behind the times on what we think is too large.



-- Original Message --
From: "Suresh Ramasubramanian" mailto:ops.li...@gmail.com>>
To: "Adam Moffett" mailto:a...@plexicomm.net>>; 
"mailop@mailop.org" 
mailto:mailop@mailop.org>>
Sent: 10/23/2020 1:39:06 PM
Subject: Re: [mailop] Maximum message size

How many providers are going to accept 200 mb emails if you enable this and 
someone then tries to send one out?

--srs

From: mailop mailto:mailop-boun...@mailop.org>> on 
behalf of Adam Moffett via mailop mailto:mailop@mailop.org>>
Sent: Friday, October 23, 2020 10:53:51 PM
To: mailop@mailop.org 
mailto:mailop@mailop.org>>
Subject: [mailop] Maximum message size

I'm at 200MB maximum message size and have someone requesting we increase that 
limit.

Is there any current consensus on what it should be?


-- Adam Moffett, Network Engineer
Plexicomm - Internet Solutions | www.plexicomm.net
Office: 1.866.759.4678 x104

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Re: [mailop] Maximum message size

2020-10-23 Thread Thomas Walter via mailop 


On 23.10.20 22:51, Jay Hennigan via mailop wrote:
> Perhaps someone should come up with a protocol designed to transfer
> files. They could name it File Transfer Protocol and abbreviate it FTP.

I'd prefer something with "Secure" in it's name though, preferably in
the front, so it shows the importance of it.

Regards,
Thomas Walter

-- 
Thomas Walter
Datenverarbeitungszentrale

FH Münster
- University of Applied Sciences -
Corrensstr. 25, Raum B 112
48149 Münster

Tel: +49 251 83 64 908
Fax: +49 251 83 64 910
www.fh-muenster.de/dvz/



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Re: [mailop] Maximum message size

2020-10-23 Thread Jaroslaw Rafa via mailop 
Dnia 23.10.2020 o godz. 17:47:00 Adam Moffett via mailop pisze:
> Yes, it was set to 200MB years ago by request of an engineer sending
> CAD files.
> Now I have someone else who wants it larger.

Does that someone know that services like WeTransfer or similar exist? Or
that one can share files via eg. Google Drive?
There are numerous possibilities instead of trying to send excessively large
files via email.
-- 
Regards,
   Jaroslaw Rafa
   r...@rafa.eu.org
--
"In a million years, when kids go to school, they're gonna know: once there
was a Hushpuppy, and she lived with her daddy in the Bathtub."
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Re: [mailop] Maximum message size

2020-10-23 Thread Jay Hennigan via mailop 

On 10/23/20 10:23, Adam Moffett via mailop wrote:
I'm at 200MB maximum message size and have someone requesting we 
increase that limit.


Is there any current consensus on what it should be?


I think you'll find that the rest of the Internet has a limit far lower, 
about 20 MB is


Never underestimate the throughput of a FedEx truck full of hard drives. 
Or Dropbox, etc.


Perhaps someone should come up with a protocol designed to transfer 
files. They could name it File Transfer Protocol and abbreviate it FTP.


--
Jay Hennigan - j...@west.net
Network Engineering - CCIE #7880
503 897-8550 - WB6RDV
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Re: [mailop] Protection.outlook.com SPF hoops to jump for IPv6

2020-10-23 Thread John Levine via mailop 
In article  you write:
>When sending messages to a *.mail.protection.outlook.com host via IPv6,
>our mail host gets the following email status:
>
>#4.7.26 SMTP; 450 4.7.26 Service does not accept messages sent over IPv6
>[2001:708:10:6004::22] unless they pass either SPF or DKIM validation (message
>not signed) (S825). [DB5EUR03FT043.eop-EUR03.prod.protection.outlook.com]

FWIW, Gmail has had the same rule for a long time, all IPv6 mail must
be validated with SPF or DKIM, so you're better off fixing whatever is
wrong.

Do you know what address it's trying to send mail from?  It looks to me like
your SPF record allows 2001:708:10:6004::22 and ::14

R's,
John
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Re: [mailop] Maximum message size

2020-10-23 Thread Suresh Ramasubramanian via mailop 
Some of the largest emails I’m seeing over the years are random spams with huge 
amounts of hashbuster text, that figure out that many spam filters will skip 
scanning overly large emails.  Most regular users these days appear to know 
about and use file sharing services.

--srs

From: mailop  on behalf of Michael Peddemors via 
mailop 
Sent: Friday, October 23, 2020 11:38:53 PM
To: mailop@mailop.org 
Subject: Re: [mailop] Maximum message size

By default we still distribute with a 10MG maximum size, but frankly
almost all of our customers has bumped it to the maximum we recommend,
which is 20MG.  (the odd one even went to 30, but we don't recommend that)

Too bad this isnt' escalated to a recommended standard.

How about we use this as a chance to discuss this with other groups such
as M3AAWG and IETF, to try to come up with a written consensus for
others to follow.. (I think gmail still has the 25MG max size, but
someone can correct me on that)

On 2020-10-23 10:48 a.m., Evert Mouw via mailop wrote:
> On 10/23/20 7:23 PM, Adam Moffett via mailop wrote:
>> I'm at 200MB maximum message size and have someone requesting we
>> increase that limit.
>>
>> Is there any current consensus on what it should be?
>>
>
> Current default max. message size for Postfix configurations:
>
> message_size_limit (default: 1024) / The maximal size in bytes of a
> message, including envelope information.
>
> http://www.postfix.org/postconf.5.html
>
> Also Microsoft Exchange 2019 has a default limit of 10 MB.
>
> https://docs.microsoft.com/en-us/exchange/mail-flow/message-size-limits?view=exchserver-2019
>
> Increase the limit all you want but don't expect other parties to accept
> or deliver large messages. I would not increase, but DEcrease the limit
> in your case. Learn the user to use other file transfer methods, or if
> you like Thunderbird, check this:
>
> https://support.mozilla.org/en-US/kb/filelink-large-attachments
>
> Regards, Evert
>
>
>
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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

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Re: [mailop] bell.ca/bell.net contact?

2020-10-23 Thread Erwin Harte via mailop 

On 10/23/20 11:04 AM, Erwin Harte wrote:

Hello,

We appear to be hitting a capacity ceiling from one of our ranges 
(15.222.16.128/25) in delivering to their servers at 184.150.200.82 
(smtpvipmtrlin.bell.net/mxmta.owm.bell.net) and 184.150.200.210 
(smtpviptorin.bell.net/mxmta.owm.bell.net).


I reached out to postmas...@bell.ca (postmas...@bell.net bounced, 
alas) at the end of yesterday afternoon (PDT) but no response yet, so 
maybe someone here can put me in touch with them, or suggest a way?


A suggestion I received off-list was ispsupp...@bell.ca but that address 
doesn't seem to exist at this time.


: host mx-wyn.bell.ca[67.69.243.161] said: 550 #5.1.0
    Address rejected. (in reply to RCPT TO command)

Thanks,
Erwin

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Re: [mailop] Maximum message size

2020-10-23 Thread Robert Blayzor via mailop 
On 10/23/20 1:23 PM, Adam Moffett via mailop wrote:
> I'm at 200MB maximum message size and have someone requesting we
> increase that limit.
> 
> Is there any current consensus on what it should be?


Sheesh...  Sounds like someone needs Dropbox or Nextcloud...

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PGP:  https://pgp.inoc.net/rblayzor/
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Re: [mailop] SBC Global Contact

2020-10-23 Thread Stuart Hochwert via mailop 
Ken - 

We have had this too when we add a new IP. Sometimes we find it was on some
internal block list. SBC is managed by AT as I recall.  You e-mail:
abuse_...@abuse-att.net

The block message may contain the link or e-mail as I recall.  Sometimes
they respond in 12 hours, typically 1 - 2 days. And sometimes you need to
submit again after a few days. 

They have been responsive and fixed the block. 

My notes indicate ATT manages e-mail for some streams for SBC Global,
Bellsouth and some smaller former Bells.

---
Stuart Hochwert
shochw...@primecp.com
Prime Publishing LLC
3400 Dundee Road, Suite 220
Northbrook, IL 60062
847-205-9375 Main | 847-513-6099 Fax | 847-513-6093 Direct


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Re: [mailop] [E] Re: Maximum message size

2020-10-23 Thread Marcel Becker via mailop 
On Fri, Oct 23, 2020 at 10:51 AM Adam Moffett via mailop 
wrote:


> Meanwhile I have found in Google searching that GMail allows 25MB and I
> believe O365 is 150MB max.
>

https://help.yahoo.com/kb/message-size-limits-yahoo-mail-sln5673.html
https://help.aol.com/articles/Send-and-download-attachments-in-AOL-Mail


Cheers,
Marcel
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[mailop] bell.ca/bell.net contact?

2020-10-23 Thread Erwin Harte via mailop 

Hello,

We appear to be hitting a capacity ceiling from one of our ranges 
(15.222.16.128/25) in delivering to their servers at 184.150.200.82 
(smtpvipmtrlin.bell.net/mxmta.owm.bell.net) and 184.150.200.210 
(smtpviptorin.bell.net/mxmta.owm.bell.net).


I reached out to postmas...@bell.ca (postmas...@bell.net bounced, alas) 
at the end of yesterday afternoon (PDT) but no response yet, so maybe 
someone here can put me in touch with them, or suggest a way?


Thanks in advance,
Erwin

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Re: [mailop] Maximum message size

2020-10-23 Thread Michael Peddemors via mailop 
By default we still distribute with a 10MG maximum size, but frankly 
almost all of our customers has bumped it to the maximum we recommend, 
which is 20MG.  (the odd one even went to 30, but we don't recommend that)


Too bad this isnt' escalated to a recommended standard.

How about we use this as a chance to discuss this with other groups such 
as M3AAWG and IETF, to try to come up with a written consensus for 
others to follow.. (I think gmail still has the 25MG max size, but 
someone can correct me on that)


On 2020-10-23 10:48 a.m., Evert Mouw via mailop wrote:

On 10/23/20 7:23 PM, Adam Moffett via mailop wrote:
I'm at 200MB maximum message size and have someone requesting we 
increase that limit.


Is there any current consensus on what it should be?



Current default max. message size for Postfix configurations:

message_size_limit (default: 1024) / The maximal size in bytes of a 
message, including envelope information.


http://www.postfix.org/postconf.5.html

Also Microsoft Exchange 2019 has a default limit of 10 MB.

https://docs.microsoft.com/en-us/exchange/mail-flow/message-size-limits?view=exchserver-2019

Increase the limit all you want but don't expect other parties to accept 
or deliver large messages. I would not increase, but DEcrease the limit 
in your case. Learn the user to use other file transfer methods, or if 
you like Thunderbird, check this:


https://support.mozilla.org/en-US/kb/filelink-large-attachments

Regards, Evert



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Re: [mailop] Maximum message size

2020-10-23 Thread Evert Mouw via mailop 

On 10/23/20 7:23 PM, Adam Moffett via mailop wrote:
I'm at 200MB maximum message size and have someone requesting we 
increase that limit.


Is there any current consensus on what it should be?



Current default max. message size for Postfix configurations:

message_size_limit (default: 1024) / The maximal size in bytes of a 
message, including envelope information.


http://www.postfix.org/postconf.5.html

Also Microsoft Exchange 2019 has a default limit of 10 MB.

https://docs.microsoft.com/en-us/exchange/mail-flow/message-size-limits?view=exchserver-2019

Increase the limit all you want but don't expect other parties to accept 
or deliver large messages. I would not increase, but DEcrease the limit 
in your case. Learn the user to use other file transfer methods, or if 
you like Thunderbird, check this:


https://support.mozilla.org/en-US/kb/filelink-large-attachments

Regards, Evert


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Re: [mailop] Maximum message size

2020-10-23 Thread Eric Tykwinski via mailop 
Exactly what I was thinking:

150MB for Microsoft Online
https://docs.microsoft.com/en-us/office365/servicedescriptions/exchange-onli
ne-service-description/exchange-online-limits#message-limits-1

50 MB for GSuite: https://support.google.com/a/answer/175121?hl=en

 

If you can upsell to something like NextCloud/GDrive/OneDrive et al..

 

Sincerely,

 

Eric Tykwinski

TrueNet, Inc.

P: 610-429-8300

 

From: mailop  On Behalf Of Suresh Ramasubramanian
via mailop
Sent: Friday, October 23, 2020 1:39 PM
To: Adam Moffett ; mailop@mailop.org
Subject: Re: [mailop] Maximum message size

 

How many providers are going to accept 200 mb emails if you enable this and
someone then tries to send one out?

 

--srs

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Re: [mailop] Maximum message size

2020-10-23 Thread Adam Moffett via mailop 
Yes, it was set to 200MB years ago by request of an engineer sending CAD 
files.

Now I have someone else who wants it larger.

Meanwhile I have found in Google searching that GMail allows 25MB and I 
believe O365 is 150MB max.


My initial impulse was to say no to this request because I'm aware of 
the DOS possibilities with large email sizes, but I thought I'd ask the 
community to see if I'm behind the times on what we think is too large.




-- Original Message --
From: "Suresh Ramasubramanian" 
To: "Adam Moffett" ; "mailop@mailop.org" 


Sent: 10/23/2020 1:39:06 PM
Subject: Re: [mailop] Maximum message size

How many providers are going to accept 200 mb emails if you enable this 
and someone then tries to send one out?


--srs

From: mailop  on behalf of Adam Moffett via 
mailop 

Sent: Friday, October 23, 2020 10:53:51 PM
To:mailop@mailop.org 
Subject: [mailop] Maximum message size

I'm at 200MB maximum message size and have someone requesting we 
increase that limit.


Is there any current consensus on what it should be?


-- Adam Moffett, Network Engineer
Plexicomm - Internet Solutions | www.plexicomm.net
Office: 1.866.759.4678 x104
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Re: [mailop] Maximum message size

2020-10-23 Thread Suresh Ramasubramanian via mailop 
How many providers are going to accept 200 mb emails if you enable this and 
someone then tries to send one out?

--srs

From: mailop  on behalf of Adam Moffett via mailop 

Sent: Friday, October 23, 2020 10:53:51 PM
To: mailop@mailop.org 
Subject: [mailop] Maximum message size

I'm at 200MB maximum message size and have someone requesting we increase that 
limit.

Is there any current consensus on what it should be?


-- Adam Moffett, Network Engineer
Plexicomm - Internet Solutions | www.plexicomm.net
Office: 1.866.759.4678 x104

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[mailop] Maximum message size

2020-10-23 Thread Adam Moffett via mailop 
I'm at 200MB maximum message size and have someone requesting we 
increase that limit.


Is there any current consensus on what it should be?


-- Adam Moffett, Network Engineer
Plexicomm - Internet Solutions | www.plexicomm.net
Office: 1.866.759.4678 x104
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[mailop] SBC Global Contact

2020-10-23 Thread Kenneth Vedder via mailop 
Good Morning,

I was wondering if there is an SBC Contact on the list. I added a new mail
server on a new IP overnight, and see that the IP is apparently on the
block list.

Thanks,
Ken Vedder
Amplex Internet
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Re: [mailop] Protection.outlook.com SPF hoops to jump for IPv6

2020-10-23 Thread Peter N. M. Hansteen via mailop 
On Fri, Oct 23, 2020 at 10:28:28AM +0300, Otto J. Makela via mailop wrote:
> 
> SPF for aka.fi is, as far as I can tell, correct albeit non-restrictive.
> Before I start randomly making changes (like adding DKIM etc), does anyone
> have ideas?

I would guess it's the "?all" part they don't like. That basically says,

"the preceding info is correct but we think you should accept mail claiming to 
be
from us regardless of what host tries to deliver" 

Then again, you *did* get an error message back. Unfortunately MSFT has a
history of having mail silently disappear. It's somewhat encouraging if they
have finally stopped doing that.

All the best,
Peter
-- 
Peter N. M. Hansteen, member of the first RFC 1149 implementation team
http://bsdly.blogspot.com/ http://www.bsdly.net/ http://www.nuug.no/
"Remember to set the evil bit on all malicious network traffic"
delilah spamd[29949]: 85.152.224.147: disconnected after 42673 seconds.
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Re: [mailop] Protection.outlook.com SPF hoops to jump for IPv6

2020-10-23 Thread Jaroslaw Rafa via mailop 
Dnia 23.10.2020 o godz. 10:28:28 Otto J. Makela via mailop pisze:
> https://www.spf-record.com/spf-lookup/aka.fi?ip=2001:708:10:6004::22
> 
> The latter test gives me a slightly germanic error about non-restrictiveness.

I guess you are talking about this:

Syntax check not passed: 1 error
The mechanisms in the SPF record are not valid!
Error in '?all' -> ' "?" ist ungülter oder unsicherer Wert! (- oder ~
nutzen!)'
OK for 'v' -> 'spf1'
OK for 'mx'
OK for 'include' -> '_spf.lyyti.fi'
OK for 'ip4' -> '185.74.174.133'
OK for 'ip4' -> '185.74.174.128/25'
OK for 'ip4' -> '81.22.248.5'
OK for 'ip4' -> '185.129.153.23'
OK for 'include' -> 'hosted-at.csc.fi'

The German text translated to English says: "?" is an incorrect or unsecure
value (use - or ~)
-- 
Regards,
   Jaroslaw Rafa
   r...@rafa.eu.org
--
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[mailop] Protection.outlook.com SPF hoops to jump for IPv6

2020-10-23 Thread Otto J. Makela via mailop 
We have a customer (Finnish Academy aka.fi) who use our services to send out
emails through our server smtp.sdn.csc.fi. Unfortunately, Outlook.com seems to
have added more hoops for us to jump through.

When sending messages to a *.mail.protection.outlook.com host via IPv6,
our mail host gets the following email status:

#4.7.26 SMTP; 450 4.7.26 Service does not accept messages sent over IPv6
[2001:708:10:6004::22] unless they pass either SPF or DKIM validation (message
not signed) (S825). [DB5EUR03FT043.eop-EUR03.prod.protection.outlook.com]

SPF for aka.fi is, as far as I can tell, correct albeit non-restrictive.
Before I start randomly making changes (like adding DKIM etc), does anyone
have ideas?

https://mxtoolbox.com/SuperTool.aspx?action=spf%3aaka.fi=toolpage
https://www.spf-record.com/spf-lookup/aka.fi?ip=2001:708:10:6004::22

The latter test gives me a slightly germanic error about non-restrictiveness.
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