See I figured it was a rDNS thingy since the Host for the Zone Record does some really ^*)&))(*( things
If you where to telnet to mail.kahanandstark.com 25 And HELO you will see it comes up as the Zone Record hosting party and NOT the server directly Seemed kinda of screwed up to me Yet if you dnstuff the domain name it appears kinda ok (cname) shows the correct server public IP So that's why I fugred AOL was bouncing so much back cause the rDNS was not say "just so..." bill -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ken Cornetet Sent: Thursday, September 30, 2004 1:00 PM To: Exchange Discussions Subject: RE: Exch being bounced by say AOL - bad-No PTR? Are you sure they block on a lack of a match? Or, do they only block if the rDNS fails? Ours do not match, and I'm sure if AOL were bouncing our mail, at least one of our 4000 users would have noticed. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kennedy, Jim Sent: Thursday, September 30, 2004 7:59 AM To: Exchange Discussions Subject: RE: Exch being bounced by say AOL - bad-No PTR? Unless they have changed they do not look at the message envelope or 'from' against the PTR. They look at the HELO your server sends and then look at the rDNS for the connection IP. If they do not match they drop it. Hopefully you have Exch 2003. If so the fix is easy. Find out what the rDNS is for your public sending IP address. Hit your SMTP virtual server properties under Delivery then hit advanced. Set the masquerade domain to match the rDNS of your public sending IP. The masquerade domain will then be what your server HELO's with and you are good to go. If you have 2000 or 5.5 then get the ISP's to change the rDNS on the sending IP addies to match your HELO, easier that way. What they are doing is not RFC compliant, for the record. It is recomended that you have mathcing HELO vs rDNS but the RFC specifically says do not block based upon a mismatch. JK > -----Original Message----- > From: Mellott, Bill > Sent: Wednesday, September 29, 2004 5:15 PM > To: Exchange Discussions > Subject: Exch being bounced by say AOL - bad-No PTR? > > Exch2003 Server 2003 (SBS2003) > > Setup with say 2 E-mail domains > @myco.com > @yourco.com > > Each user it assigned an address for each domain [EMAIL PROTECTED] AND > [EMAIL PROTECTED] > > With @myco.com being the default reply > > Now the ISP has been nice enough to point the MX records for these > domains to the server at IP A.B.C.D > > Now a rev DNS at say dnstuff.com on @myco.com reveals indeed the PTR > is there for myco.com BUT a rev DNS on yourco.com revels the PTR to > the ISP > > One User has yourco.com as their reply default so.... [EMAIL PROTECTED] > > now this suser Jabne sends an e-mail to a friend at AOL..now AOL does > a rev lookup for spam right?... > So the e-mail bounces back with the stuff from AOL indictae you may > not relay thru..bad > > Am I correct is assuming that the reason it is being bounced back is > because AOL can not rev look up YOURCO.com because the ISP has NOT put > in the PTR for yourco.com? To point back to the server at A.B.C.D > > Thanks > bill > > _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&; lang=english To unsubscribe send a blank email to %%email.unsub%% Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang =english To unsubscribe send a blank email to %%email.unsub%% Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang=english To unsubscribe send a blank email to [EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with.
