exchange 2003 error message delivery failure smtp;554 Transaction Failed Spam Message not queued

redmayne
redmayne used Ask the Experts™
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we recently started having some issues where it appeared that our mail server was suddenly blacklisted several days ago incorrectly - there was no spam being geenerated so we remvoed the servers a couple of days ago from the blacklists but we still get a lot of domains which are generating delays

such as
This is an automatically generated Delivery Status Notification.

THIS IS A WARNING MESSAGE ONLY.

YOU DO NOT NEED TO RESEND YOUR MESSAGE.

Delivery to the following recipients has been delayed.

       eet-confirmations@xxxxx.com (domain removed)

this is with several companies too and some are still just flat refusing - this error message
 smtp;554 Transaction Failed Spam Message not queued

seems common in the failed ones too -

our setup is that all mail routes direct over the internet and has been doiung fine with the current setuup for several months this only happened 1 week ago and was to pretty much everyonme till we removed ourselves from all the blacklists

has anyone got any ideas on this??


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Hi Redmayne,

Message delay messages are mostly because of Greylisting (quite anoying way of ANTI SPAM checking).
Check if you're DNS records are OK, especially your reverse lookup records.
Also make a SPF record, this is a record that is checked quite often by companies.

Regards,
BB

Author

Commented:
Hi

I am not a huge expert on exchange and email in general - greylistings? never heard of them but will look in to it

for reverse DNS i checked with an MX lookup site and reverse DNS was valid for our sending and receiving IP's

what is an SPF record and how do you do that?

thanks
Check this site out. It also has a wizard for creating one.
http://www.openspf.org/
Basically a SPF record states which mail servers are allowed for mailing from you domain...
Sudeep SharmaTechnical Designer

Commented:
you could also check if the IP address of your mail server is listed in any of the RBL databases. Use the below URLS to find out:
http://www.uceprotect.net/en/rblcheck.php
http://cqcounter.com/rbl_check/
http://www.dnsqueries.com/en/check_banned_ip.php

I hope that would help

Thanks
Sudeep

Author

Commented:
Thanks for the info that will sort it im sure

cheers

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