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From: Philippe Chaintreuil on 9 Jun 2010 19:06
On 6/9/10 5:34 PM, Victor Duchovni wrote:
> Make sure you don't have window-scaling enabled on your MTA, and that
> path MTU discovery works through your firewall. If that does not solve it,
> see other suggestions in thread.

I turned off my firewall (iptables) and the issue still occurs. I also
tried turning off MTU discovery while the MTU was set low (950). I also
expanded the keep-alive time with no love, same goes for disabling
window-scaling.

-- Philippe Chaintreuil

From: Olivier MJ Crepin-Leblond on 11 Jun 2010 03:02

Le 09/06/2010 23:19, Wietse Venema a écrit :
> Philippe Chaintreuil:
>
>> One of our users sent a large (about 10MB) e-mail to Yahoo. Yahoo has
>> not been accepting it, they don't give a reason, they just disconnect
>> after getting the whole message:
>>
>> ------------------------------------------------------------------------
>> Jun 9 13:20:50 hobbes postfix/smtp[7398]: 02EB432E022: lost connection
>> with e.mx.mail.yahoo.com[67.195.168.230] while sending end of data --
>> message may be sent more than once
>> ------------------------------------------------------------------------
>>
>> Small messages make it through without a problem, and sending the same
>> message from a Gmail account works.
>>
> Instead of tweaking, spend the effort to become whitelisted.
>
> Wietse
>
>

I emailed Yahoo using the instructions which they had provided the
previous time this subject was touched, and they replied to me:

--- snip ---

From : Yahoo! Mail <mail-abuse-bulk(a)cc.yahoo-inc.com>


Thank you for submitting your White List application. We have changed
our application form so that you can provide us with more detailed
information about your emailing practices.

Please use our new form to submit your application. The new form can be
found at:

http://help.yahoo.com/l/us/yahoo/mail/postmaster/bulkv2.html

Thank you.

--- snip ---

Not only can you get whitelisted using this form, but you can describe
the time-out with large messages.
Along with Postfix rate-limiting features, this should improve delivery
with Yahoo MX.

Kind regards,

Olivier

--
Olivier MJ Crépin-Leblond, PhD
http://www.gih.com/ocl.html

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