On Thu, 21 Oct 2010 21:52:38 +0800 Denny Lin dennylin93@hs.ntnu.edu.tw articulated:
Oh yeah, I forgot to mention that. A better solution would be to check the rDNS or SPF record and do sender verification if it doesn't match.
Actually, "SPF" has been going out of vogue for awhile now and sensible mail admins do not make accept/deny decisions entirely on pass/fail of SPF tests. Many SAs are finding it causes more problems than it solves. When added to the fact that its use is by no means universal, its continued use is seriously in doubt. In other words, "Use at your own risk." There are, as has been pointed out, better methods available.
-- Jerry ✌ Dovecot.user@seibercom.net
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Boston, Massachusetts. First Presidential Debate