From: Ace Suares (listssuares.an)
Date: Thu Dec 14 2006 - 07:18:35 CST

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Hello,

Sorry, this message was sent from a wrong account and I assumed you had
read it, but it did not appear on the list (of course).
Before you react to this, wait for the following mail, I got some more
information in just a sec.
Ace

On Wednesday 13 December 2006 10:48, Wietse Venema wrote:

Hm.

The 'client' is my server (just to avoid misunderstandings)

> You also report that the server never received "MAIL FROM".

Some say 'timeout after MAIL FROM', some say 'timeout after DATA' but the
first happens more.

> We may therefore conclude that you are sending through a broken
> firewall that tries to understand SMTP and screws up.
>

This would be the firewall that sits in front of those other servers, I
presume.

> To demonstrate firewall breakage:
>
> # postconf -e smtp_never_send_ehlo=yes
> # postfix reload
> # postfix flush
>
> If that does make the difference then you know what to do.

I am not sure. EHLO is not sent anymore, instead HELO is sent.
I get different breakage now, still a lot of retransmissions. Still
timeouts.

I put a tcpdump in the same place as before, if you want, please have a
look at it. The tcpdump happens right after postfix flush.

Cheers,
ace

>
> Wietse

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