Is it possible that your Mail server 65.16.167.134 was set to open relay at one time? I just searched some open relay databases and didn't find anything but a couple of them of reported your ip address being checked.
e.g. http://www.rfc-ignorant.org/tools/detail.php?domain=65.166.142/8&submitted=1013703079&table=ipwhois ttyl, Allen Armstrong On Thu, 3 Jul 2003, Todd - Smart Mail wrote: > re still getting email sent from our servers bounced back. The IMail log shows - > > 07:03 07:42 SMTP-(000006D8) >MAIL FROM:<[EMAIL PROTECTED]> > 07:03 07:42 SMTP-(000006D8) 553 5.1.8 <[EMAIL PROTECTED]>... Domain of sender > address [EMAIL PROTECTED] does not exist > 07:03 07:42 SMTP-(000006D8) ERR undeliverable 553 5.1.8 <[EMAIL PROTECTED]>... > Domain of sender address [EMAIL PROTECTED] does not exist > 07:03 07:42 SMTP-(000006D8) SMTP_DELIV_FAILED > 07:03 07:42 SMTP-(000006D8) >QUIT > > > My understanding is that its DNS issue. The remote server cannot locate/resolve the > domain and so it thinks that it does not exist. > > The bounces are coming exclusively from domains that have Sendmail 8.xx servers. > > I spoke with an email admin two days ago that was good enough to reboot his DNS > servers. After he did that we were able to send to his domain without problems for > a while, now we are getting bounces again. . > > We are having this problem with many larger companies, reliant.com, pbsolar.com, > netzero.com to name a few. > > Help is Greatly Appreciated. > > > > Todd Hunter > Progressive Systems > -- 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/
