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adusei asked on

Undeliverable email message

Emails from our domain (ccmsgov.us) are not delivered. This is the undeliverable email message I get:

Sent:     5/21/2008 12:21 PM

The following recipient(s) could not be reached:

      Adusei (isaac@adusei.com) on 5/21/2008 12:21 PM

            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.

            <ccmailserv.ccmsgov.us #5.5.0 smtp;550-"JunkMail rejected - (ccmailserv.ccmsgov.us) [12.173.75.18] is in an RBL,>

Also see the attached message.

Please, I would need your help as soon as you can. Thanks.

Isaac
ATT231285.txt
Email ProtocolsExchangeEmail Software

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Last Comment
kieran_b

8/22/2022 - Mon
mgonullu

I think you have to contact your ISP your DNS name seems to be in a black hole list
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kieran_b

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ASKER
adusei

Yes, I think our domain has been put on the blacklist. when I go to this site:

*************************************************************************************************
http://cbl.abuseat.org/lookup.cgi?ip=12.173.75.18     this is what I get:

IP Address 12.173.75.18 is currently listed in the CBL.

It was detected at 2008-05-22 12:00 GMT (+/- 30 minutes), approximately 4 hours, 30 minutes ago.

ATTENTION: This IP is infected with, or NATting for a computer infected with a high volume spam sending trojan - it is participating in a botnet.

You need to patch your system and then fix/remove the trojan. Do this before delisting, or you're most likely to be listed again almost immediately.

******************************************************************************************************************

My question is how do I patch my system to remove remove this trojan. I have Trend Micro running on all PCs and servers though. This will help me request for delisting our domain from the blacklist.

Thanks.

Isaac
kieran_b

Is .18 the primary IP?

If it is, then it is probably a workstation that is infected - have a look at your router logs and you will see a stack of traffic going out on port 25

Ideally, you want to set your router so only a few servers can go out on port 25.
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