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Invalid sender domain MX record

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=4757
Printed Date: 25 June 2025 at 12:04am


Topic: Invalid sender domain MX record
Posted By: Guests
Subject: Invalid sender domain MX record
Date Posted: 14 December 2004 at 11:06am

What does this mean? One of my customers' email is caught with this "Invalid sender domain MX record" problem.

 


Replies:
Posted By: Guests
Date Posted: 14 December 2004 at 11:09am
OK, I know it says the MX record for the sender's domain does not exist, but i guess my question is, if the MX record is missing, does that mean this is a spam email?

Posted By: Desperado
Date Posted: 14 December 2004 at 11:43am

Benny,

Follow the following threads.  BUT ... Read all the posts as there has been quite a lot of discussion:

http://www.logsat.com/spamfilter/forums/showmessage.asp?messageID=4597" CLASS="ASPForums" TITLE="WARNING: URL created by poster. - http://www.logsat.com/spamfilter/forums/showmessage.asp?messageID=4597" CLASS="ASPForums" TITLE="WARNING: URL created by poster. - http://www.logsat.com/spamfilter/forums/showmessage.asp?messageID=4597
http://www.logsat.com/spamfilter/forums/showmessage.asp?messageID=4665" CLASS="ASPForums" TITLE="WARNING: URL created by poster. - http://www.logsat.com/spamfilter/forums/showmessage.asp?messageID=4665" CLASS="ASPForums" TITLE="WARNING: URL created by poster. - http://www.logsat.com/spamfilter/forums/showmessage.asp?messageID=4665

Dan Seligmann

Posted By: LogSat
Date Posted: 14 December 2004 at 6:09pm
Benny,

The MX record filter checks to see if the email domain of the sender's email address has a valid MX record assigned to it. If it's missing or is invalid, then SpamFilter will reject the email.

While having an MX record is not strictly required, it is a good practice for administrators to configure one for the email domains they use. As Dan S. suggested, please see the link he provided for a full discussion.

Roberto F. LogSat Software

Posted By: Guests
Date Posted: 13 February 2006 at 6:29pm

Please advise what MX stands for?

 

Posted By: LogSat
Date Posted: 13 February 2006 at 6:51pm
It is the Mail eXcahnger record(s) in the DNS. It tells an SMTP server to which address it needs to send emails addressed for a domain.

Please see http://www.rfc-editor.org/rfc/rfc2821.txt - RFC 2821 for more details.


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