| Reverse DNS Lookup [message #2247] |
Sat, 24 July 2010 14:50  |
WaveJam
Messages: 22
Registered: June 2005 |
Junior Member |
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I'm getting pelted with spam that looks very legitimate through Cleanmails eyes. The scores are around 2. Looking for ways to clean those out. I noticed that if I did a IP lookup on the delivering Host address, the name does not exist or matchup to what is in the header of the spam. I remember a long time ago, we used to block if the name didn't match up to the IP. Is that still a working method, or no? Can I implement that with Cleanmail?
Thanks.
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| Re: Reverse DNS Lookup [message #2248 is a reply to message #2247 ] |
Mon, 26 July 2010 13:22  |
support
Messages: 847
Registered: April 2004 |
Senior Member |
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| WaveJam wrote on Sat, 24 July 2010 14:50 | I'm getting pelted with spam that looks very legitimate through Cleanmails eyes. The scores are around 2. Looking for ways to clean those out. I noticed that if I did a IP lookup on the delivering Host address, the name does not exist or matchup to what is in the header of the spam. I remember a long time ago, we used to block if the name didn't match up to the IP. Is that still a working method, or no? Can I implement that with Cleanmail?
Thanks.
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We suggest that you edit the local.cf file in the sa\ruleset subfolder and add
score RDNS_NONE 4.5
to raise the score of the RDNS_NONE rule (triggered by mails delivered by a host with no reverse DNS entry) to 4.5.
[Updated on: Mon, 26 July 2010 13:23]
Customer Support
Byteplant GmbH
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