Hello;

I recently survived an IP address change when my ISP changed upstream
providers. This was about 10 days ago. Today, the mail servers I administer
[all SIMS servers] quit receiving mail because of return path errors:


01:14:11 3 SMTP-029(web11004.mail.yahoo.com) Failed to verify. Real address
is [216.136.131.54:3781]
01:15:15 3 SMTP-029([216.136.131.54]) Return-Path-A Search Error. Error
Code=-3162
01:15:15 3 SMTP-029([216.136.131.54]) Abort Received, reason=1558728
01:19:01 3 SMTP-030(ancmail03.ancestry.com) Failed to verify. Real address
is [216.10.103.201:2858]
01:20:05 3 SMTP-030([216.10.103.201]) Return-Path-A Search Error. Error
Code=-3162
01:28:58 3 SMTP-031(juno.com) Failed to get IP addresses. Error Code=-3162
01:28:58 3 SMTP [S.0000013306] dequeueing
01:29:44 3 SMTP-032(myfamlsmtp01.myfamilysouth.com) Failed to verify. Real
address is [63.92.89.123:2442]
01:30:37 3 SMTP-033(ancmail03.ancestry.com) Failed to verify. Real address
is [216.10.103.201:1567]
01:30:48 3 SMTP-032([63.92.89.123]) Return-Path-A Search Error. Error
Code=-3162
01:31:41 3 SMTP-033([216.10.103.201]) Return-Path-A Search Error. Error
Code=-3162
01:33:15 3 SMTP-034(femail7.sdc1.sfba.home.com) Failed to verify. Real
address is [24.0.95.87:49989]
01:34:19 3 SMTP-034([24.0.95.87]) Return-Path-A Search Error. Error
Code=-3162
01:36:07 3 SMTP-035(thunderer.nxlkhost.com) Failed to verify. Real address
is [207.155.252.51:58518]
01:37:10 0 SYSTEM The current date is Tuesday, August 14, 2001
01:37:10 3 SMTP-035([207.155.252.51]) Return-Path-A Search Error. Error
Code=-3162

It doesn't seem that the absence of PTR records for our new IP addresses
should cause this. We are trying to get the reverse delegation sorted out,
but what is really going on? In the meantime, I have turned off Verify
Return Paths to allow mail in.

Thanks;
Jeff


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