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RCPT TO

Printed From: LogSat Software
Category: Spam Filter ISP
Forum Name: Spam Filter ISP Support
Forum Description: General support for Spam Filter ISP
URL: https://www.logsat.com/spamfilter/forums/forum_posts.asp?TID=6244
Printed Date: 15 January 2025 at 3:55am


Topic: RCPT TO
Posted By: Stephane_999
Subject: RCPT TO
Date Posted: 18 September 2007 at 1:48pm
Hi, We seem to experience a problem with large authorized lists (950 names)
 
When i look in the Connections window, i see many connections some go through very fast but a lot of them get stuck with a status 'RCPT TO'.  I used the debug view window to monitor *.*.*.*, and i see that spamfilter does not send back the <<250 Address okay prompt rigth away.. or even never..
 
We had this problem with 3.5.4.704 registered, upgraded to 3.5.4.713 and still experiencing the problem, i also tried to change the timeout in the spamfilter.ini, but no change.
 
Any idea ?


Replies:
Posted By: LogSat
Date Posted: 18 September 2007 at 3:17pm
Stephane_999,

Using the debug view with *.*.*.* will not provide reliable results, as you will be monitoring *all* traffic to SpamFilter, and the debug data may be overwhelming to SpamFilter. The debug view is intended to be used with a single IP/network to pinpoint problems with that specific network.

In regards to the connections appearing "stuck", are they always from the same IPs? If so, you can use the debug view to just capture data from those IPs, and we can try to see what the problem is. If there is no pattern to them, do the "from" email addresses reported there "appear" to be legitimate addresses, or do they look like spammers? Please note that often spammers will probe mail servers, and it is somewhat normal to see a few pending connections.

This said, SpamFilter will perform many of its tests after receiving the "RCPT TO" command, and prior to outputing a "250" code if the recipient is valid. A delay in this process cold occur if the DNS server(s) used by SpamFilter is slow in responding to DNS lookups (SpamFilter has a 5 second defualt timeout on DNS queries). Could you check to ensure the DNS server(s) is working properly and responding to queries in a timely manner?


-------------
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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