Opinions on RDNS - A layer of anti-spam protection?

phn at icke-reklam.ipsec.nu phn at icke-reklam.ipsec.nu
Wed Jan 22 19:15:06 UTC 2003

Danny <lists at brenius.com> wrote:

> Greetings,

> I realize that reverse DNS is not manditory, but I believe that it can
> be used as *a* layer of protection against spam/mail-abuse/etc.

> What are your thoughts on part of this thread below?

> Thank you,

> Danny

An owner of a mailserver is completley free to reject mail for any reason.

And rejecting those lacking or with bogus RDNS will keep a lot of spam out
( and also a certain amount of legitimate mail, which _is_ a problem)

Using a reasonable accurate blocking list (SPEWS , spamcop ) will probably
reject more spam then RDNS, but not nessecarly the same mails.

Peter Håkanson         
        IPSec  Sverige      ( At Gothenburg Riverside )
           Sorry about my e-mail address, but i'm trying to keep spam out,
	   remove "icke-reklam" if you feel for mailing me. Thanx.

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