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Spam Mail with no reverse DNS entries

 
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Chao284
Warrior


Joined: 06 Sep 2004
Last Visit: 06 Aug 2011
Posts: 220
Location: Bremerton, WA
PostPosted: Sat Jul 22, 2006 12:14 am    Post subject: Spam Mail with no reverse DNS entries Reply with quote
I need to know something, is this form of spam mail that prevents some mail from being caught and blacklisted due to the fact they don't have the correct DNS, also is this another way that the spammers are trying to prevent them selves from getting capture from being black listed?
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ld
Warrior


Joined: 01 Mar 2005
Last Visit: 29 Jul 2010
Posts: 185
PostPosted: Sun Aug 06, 2006 8:50 am    Post subject: Reply with quote
Not having reverse DNS hurts the spammers. The value of the reverse DNS entry is not really used as it can't be trusted. Many mail servers make sure a reverse DNS entry exists. All mail servers should have a reverse DNS entry and if they don't many mail servers will not accept email from you.
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