On 05/14/2012 07:39 PM, Nikolaos Milas wrote:
Hello,
From certain clients I see in the logs (true IP address / DNS name
replaced):
May 14 18:36:57 mailserver postfix/submission/smtpd[21317]: timeout
after END-OF-MESSAGE from workstation1.office.example.com [10.10.11.12]
May 14 18:36:57 mailserverpostfix/submission/smtpd[21317]: disconnect
from workstation1.office.example.com [10.10.11.12]
These clients connect (using STARTTLS, port 587), authenticate (SASL
auth) and submit mail successfully, but, obviously, do not disconnect
normally and they timeout and are disconnected by the server (Postfix)
after a timeout period which I see is 5 minutes.
Okay.
Is this a known behavior of some clients (I suspect it may be Mac
Mail) under certain circumstances?
Does something go wrong due to this (default) behaviour ?
If postfix says the message was accepted, that would be the end of it;
the SMTP timeout is *precisely* to keep clients like these from hogging
expensive SMTPD connections.
It's the whole reason to set timeouts in the first place - every known
networking protocol uses time limits to protect against resource abuse.
--
J.
