RE: [Declude.JunkMail] Loads of ndr's - I think we're failing spam tests

[Dave Marchette]

The logs should tell you why other servers are rejecting you.  Based on personal observation, it appears lately that less experienced admins are actually using SpamCop’s RBL list to reject incoming SMTP at the envelope.  This is foolish for a myriad of reasons yet nevertheless, it is happening.  Others, such as Comcast and AOL, employ similar tactics for equally insidious reasons.  For instance- If you are using gateway’ed domains, and then bounce ‘mailbox full’ notifications, or if your users are utilizing autoresponders(big no no), then if just one of these bounces hits a Spamcop, AOL or Comcast trap, then your goose is cooked.  With AOL specifically, if just one AOL user complains about your server, then AOL will place you on a blocking call list, which effectively throttles your mail delivery to AOL.  This is evidenced in the logs by “blocking call canceled”.  This is actually far less bad than what others are doing now, which is sending “invalid user’ response” which means delivery attempts stop immediately.  For at least AOL, you can request a postmaster ‘feedback loop’ so that anytime an AOL user complains, they will automatically send you the email that caused the complaint.  Though I understand AOL’s need to filter vast quantities of spam, their militant behavior will eventually cause them to lose enough business that they will ultimately become insignificant.  Lately, we have started telling users that we do not support sending email to AOL or Comcast users, and we cite very specific examples of why.    Probably too much info, but the point is, admins of both large and small domains these days are dropping transmission of valid email at the envelope based in some cases upon inaccurate criteria. Advice:  Make sure you are not erroneously bouncing email to stay off of their overly sensitive blacklists.   Dave                                         From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Katie LaSalle-Lowery Sent: Wednesday, September 27, 2006 2:29 PM To: declude.junkmail@declude.com Subject: [Declude.JunkMail] Loads of ndr's - I think we're failing spam tests   Hello,   We are getting tons of ndr's.  When I check logs, receiving servers are rejecting the messages.  I suspect we're failing spam tests but I can't figure out what has changed in the last few days that would have caused this problem.   Does anyone see something about my email that would explain it or can anyone offer any other insight?   Thanks, Katie       --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com. --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.