Joseph Brennan <[EMAIL PROTECTED]> wrote on 01/04/2007 12:29:03 PM: > CONFIG: New FEATURE(`require_rdns') to reject messages from SMTP > clients whose IP address does not have proper reverse DNS.
Do they define "proper reverse DNS"? > CONFIG: New FEATURE(`block_bad_helo') to reject messages from SMTP > clients which provide a HELO/EHLO argument which is either > unqualified, or is one of our own names (i.e., the server > name instead of the client name). > CONFIG: New FEATURE(`badmx') to reject envelope sender addresses > (MAIL) whose domain part resolves to a "bad" MX record. > Based on contribution from William Dell Wisner. > > > All of these are a little dangerous. Notably, an smtp server should > accept mail with bad HELO strings from clients. Yes, anything that blocks any email caould be considered a little dangerous because some email some (L)user wants was blocked. Just like ORDB blocking open relays blocked legitimate mail from misconfigured mail servers. But it forced people to clean up their server configs. I think these new options will do the same. And that's a good thing. _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
