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New pre-release SpamFilter ISP v2.1.2.391 is available

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=4531
Printed Date: 03 December 2025 at 5:39pm


Topic: New pre-release SpamFilter ISP v2.1.2.391 is available
Posted By: LogSat
Subject: New pre-release SpamFilter ISP v2.1.2.391 is available
Date Posted: 07 November 2004 at 11:11pm
There is an increasing number of spammers who are creating bogus MX records in their domains with values of 127.0.0.1 or similar. These loopback entries are causing problems as some mail servers are suffering from mail loops when sending non-delivery emails to those domains.

We've been asked to see if SpamFilter could help. In response to this, we're developing a new filter that checks the MX record for the sender's domain. If the domain either does not have an MX record, or its value is in the 127.0.0.1-127.0.0.255 range, the email is rejected.

Earlier tests are showing that this new filter, besides solving the loopback problems for the SMTP servers, is also very effective in blocking even more spam.

A pre-release build with this feature, along with an option to limit the number of concurrent connections from a single IP, is available in the registered user are of the website for all licensed users. Please note that this build is not officially released yet, but are making it available to users if they need to solve immediate problems that may be occurring.

Roberto F. LogSat Software


Replies:
Posted By: Desperado
Date Posted: 08 November 2004 at 11:32am
This is REALLY working well!  Thank you very much!
 
Dan S.

Posted By: Guests
Date Posted: 10 November 2004 at 10:53am

Hi Roberto,

Hi does realy not understand this number limit of concurrent connections from a single IP

can you explain me this feature ?

thank you

Alain

Posted By: LogSat
Date Posted: 11 November 2004 at 10:27pm
Alain,

That filter is to prevent a single external server/user/spammer from performing a Denial of Service to SpamFilter. With it you can place a limit on the maximum number of incoming concurrent (simultaneous) connections from an IP address. This will allow other IPs to connect while disconnecting any others that are attacking SpamFilter.

Roberto F. LogSat Software


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