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Mail bypassing Spam filter

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=4695
Printed Date: 12 December 2025 at 3:04am


Topic: Mail bypassing Spam filter
Posted By: Guests
Subject: Mail bypassing Spam filter
Date Posted: 04 December 2004 at 6:29pm

Here is my dilemma. I have spam filter running on a server relay.xxx.com

ip address xxx.xxx.xxx.11

My mail server is on mail.xxx.com ip address xxx.xxx.xxx.4

my MX record for domain.com is configured with a single MXrecord pointing to relay.xxx.com

I am finding several hundred messages per day that are bypassing the relay server and being delivered directly to the mail server. Is there something I missed in the configuration or some way I can block all messages except those from the relay server from being delivered.

Thanks for your time.


Replies:
Posted By: Guests
Date Posted: 04 December 2004 at 10:52pm
It's possible that the spammers try mail.whatever when the real MX fails, or maybe you have your DNS reversed ;)

Posted By: Desperado
Date Posted: 05 December 2004 at 8:03am

The server on the dot 4 ip address should be configured to only allow connections from the SpamFilter IP and any client IP's that are allowed to use it as an outbound relay.  This is usually a simple configuration on the mail server application OR .. you can block port 25 commections to that ip at the router which is what we do.

Dan S.

 


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