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Disconnect befor sending ACK

Printed From: LogSat Software
Category: Spam Filter ISP
Forum Name: Spam Filter ISP Support
Forum Description: General support for Spam Filter ISP
URL: http://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=6975
Printed Date: 23 October 2017 at 3:06pm


Topic: Disconnect befor sending ACK
Posted By: ois
Subject: Disconnect befor sending ACK
Date Posted: 09 August 2011 at 7:41am
Hi,
in some cases SpamFilter disconnected before sending ACK.
The sending SMTP recognizes this as an error and repeats the connection.
So the recipient gets the mail up to 30 times an more.
 
Fritz



Replies:
Posted By: LogSat
Date Posted: 09 August 2011 at 4:14pm
Are you referring to the SYN, SYN-ACK, ACK sequence, which establishes an actual TCP connection? In this case, please note that we rely on the Windows subsystem to handle that part of the connection - once it is established and SpamFilter has a connected IP, then SpamFilter kicks in and starts the filtering process.

SpamFilter does force a disconnect of the remote servers on specific occasions, but these all occur after the SYN, SYN-ACK, ACK sequence. If you could provide some more details (and possibly zip and email us a section of SpamFilter's activity logfile around the time this happened to support at logsat.com) we can try to help more.


-------------
Roberto Franceschetti

http://www.logsat.com" rel="nofollow - LogSat Software

http://www.logsat.com/sfi-spam-filter.asp" rel="nofollow - Spam Filter ISP



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