Ok, I think I understand better now, thanks Scott. We also host a number of domains that absolutely never generate mail...They have no MX records and aren't configured on any mail server (example would be .net and .org domains of an active .com we have running full-function). Should these also have something in their DNS to tell MTA's that no mail bearing these domains in sender address should be accepted?
Chris ----- Original Message ----- From: R. Scott Perry To: [EMAIL PROTECTED] Sent: Wednesday, April 28, 2004 12:26 PM Subject: Re: [IMail Forum] SPF >:I'm not sure I'm able to interpret these results intelligently: >http://www.dnsstuff.com/tools/spf.ch?server=langsenkamp.com&ip=209.132.161.151 > >Can someone shed some light here? You ran an SPF test that simulated a sender of [EMAIL PROTECTED] sending E-mail from the IP 209.132.161.151. The end result was "PASS", which means that an E-mail from [EMAIL PROTECTED] from the IP 209.132.161.151 would pass SPF (and in theory be delivered without being scanned for spam, although in reality that would be implementation dependent). >Outbound mail from here always should be HELO langsenkamp.com... That actually isn't relevant to SPF (except for bounce messages, which have no sender). >... and we don't use the 'nobody' alias ... That, too, does not matter to SPF. >so I guess I'm confused as to whether this is supposed to validate the >sender or just tell an inquiring MTA that mail claiming >to be from langsenkamp.com better be coming from 209.132.161.151 or it can >be treated as hostile? SPF says that if E-mail comes from an E-mail address @langsenkamp.com, it should be coming from 209.132.161.151. -Scott --- Declude JunkMail: The advanced anti-spam solution for IMail mailservers since 2000. Declude Virus: Ultra reliable virus detection and the leader in mailserver vulnerability detection. Find out what you've been missing: Ask for a free 30-day evaluation. --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
