Error 4.4.2 Duplicate messages

2001-07-11 Thread BKY Lam

My company has implemented the Qmail 1.0.3 to handle the incoming Internet 
emails and relay them to our internal email server.

A error message
Deferral :Connected_to_x.x.x.x_but_connection_died._Possible
_duplicate!_(#4.4.2)/ has been reported when handle some incoming SMTP 
mails.(where x.x.x.x is the ip of the internal mail server)

Those mails will be kept in the queue and re-send again  again until the 
queuelifetime has been expired. The same error message will be reported when 
they have been re-sent. But our internal mail server has already received 
such mails completely and delivered to the user. So the user will received 
the same mail many times due to the qmail re-send.

Not all the incoming mails has such problem. It seem to be happened
randomly. The mails with such error message reported are from different mail 
servers and with different sending time. The mail size of them are various, 
some with attachment and some without.

No such error happened before implementation of the qmail.

Does anybody have idea on this issue and help me to solve it?

B.LAM
_
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.




Re: Error 4.4.2 Duplicate messages

2001-07-11 Thread Charles Cazabon

BKY Lam [EMAIL PROTECTED] wrote:
 
 A error message
 Deferral :Connected_to_x.x.x.x_but_connection_died._Possible
 _duplicate!_(#4.4.2)/ has been reported when handle some incoming SMTP 
 mails.(where x.x.x.x is the ip of the internal mail server)

Your internal server is dropping connections.
 
[...]
 
 No such error happened before implementation of the qmail.

It's still your internal server's problem -- it's not obeying
RFC821/2821.  Since qmail doesn't know the message was successfully
queued by your internal server (it didn't respond 2xx to the DATA
phase), it _has_ to re-attempt delivery.

Fix the internal server.  If you want proof it's broken, capture one of
these messages being transferred with tcpdump.

Charles
-- 
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Charles Cazabon[EMAIL PROTECTED]
GPL'ed software available at:  http://www.qcc.sk.ca/~charlesc/software/
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