Peer server in skip list?

mvicente — Thu, 22 Nov 2007 11:16:16 GMT

I have configured two server with ICS 2006.1 peering enabled, the server have same alias, different AD databases, different dmz, ip address of peer server in hosts file on each server, in peer sever list, all is configured according indications in Ipswitch but sometimes servers lost connection checked network path with no errors found in firewall, no error in communication with AD domain controllers, checked dns but sometimes the servers cannot validate user and cannot deliver the messages from one server the other just keeps retrying but after the max retries it return the mail as undeliverable in the form user@domain@peer_server_ip_address.
Sometimes the peer server appears in the skip list and we don´t know why.
here is part of the log.

11:2109:54SMTPD(54c8029e0000b742)[[highlight=#ffff11]172.16.1.2[/highlight]] connect 172.26.1.43 port 3664
11:2109:54SMTPD(54c8029e0000b742)[[highlight=#ffff11]172.26.1.43[/highlight]] EHLO ss3t-mailepo-01.domain.ext
11:2109:54SMTPD(54c8029e0000b742)[172.26.1.43] MAIL FROM:<>
11:2109:54SMTPD(54c8029e0000b742)[172.26.1.43] RCPT TO:
11:2109:54SMTPD(54c8029e0000b742)[x] looking up domain in HOSTS
11:2109:54SMTPD(54c8029e0000b742)[172.26.1.43] DATA
11:2109:54SMTPD(54c8029e0000b742)[172.26.1.43] E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\D54c8029e0000b742.SMD 2323
11:2109:54SMTPD(54c8029e0000b742)performing antispam checks
11:2109:55SMTP-(54c8029e0000b742)[Att-Blk] Got Attachment Blocking Host Info for mail.domain
11:2109:55SMTP-(54c8029e0000b742)processing E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\Q54c8029e0000b742.SMD
11:2109:55SMTP-(54c8029e0000b742)ERR mail.domain not local moddiv from <>
11:2109:55SMTP-(54c8029e0000b742)[x] Connecting socket to service on host <172.26.1.43> using protocol
11:2109:55SMTP-(54c8029e0000b742)[x] using source IP for mail.domain [172.16.1.2]
11:2109:56SMTP-(54c8029e0000b742)[highlight=#ffff11]Connect fail 172.26.1.43 [172.26.1.43]: connection timed out[/highlight]
11:2109:56SMTP-(54c8029e0000b742)requeuing E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\Q54c8029e0000b742.SMD R0 T1
11:2109:56SMTP-(54c8029e0000b742)finished E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\Q54c8029e0000b742.SMD status=3
11:2109:59SMTP-(54c8029e0000b742)processing E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\Q54c8029e0000b742.SMD
11:2109:59SMTP-(54c8029e0000b742)ERR mail.domain not local moddiv from <>
11:2109:59SMTP-(54c8029e0000b742)[x] Connecting socket to service on host <172.26.1.43> using protocol
11:2109:59SMTP-(54c8029e0000b742)[x] using source IP for mail.domain [172.16.1.2]
11:2109:59SMTP-(54c8029e0000b742)Connect fail 172.26.1.43 [172.26.1.43]: connection timed out
11:2109:59SMTP-(54c8029e0000b742)requeuing E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\Q54c8029e0000b742.SMD R0 T2
11:2109:59SMTP-(54c8029e0000b742)finished E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\Q54c8029e0000b742.SMD status=3
11:2110:06SMTP-(54c8029e0000b742)processing E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\Q54c8029e0000b742.SMD
11:2110:06SMTP-(54c8029e0000b742)ERR mail.domain not local moddiv from <>
11:2110:06SMTP-(54c8029e0000b742)[x] Connecting socket to service on host <172.26.1.43> using protocol
11:2110:06SMTP-(54c8029e0000b742)[x] using source IP for mail.domain [172.16.1.2]
11:2110:06SMTP-(54c8029e0000b742)Connect 172.26.1.43 [172.26.1.43:25] (0)
11:2110:06SMTP-(54c8029e0000b742)220 ss3t-mailepo-01.domain.ext (IMail 9.10 114916-1) NT-ESMTP Server X1
11:2110:06SMTP-(54c8029e0000b742)>VRFY moddiv@domain
11:2110:06SMTP-(54c8029e0000b742)252 Cannot VRFY user (no local users), but will take messages for this user and attempt to deliver.
11:2110:06SMTP-(54c8029e0000b742)>QUIT
11:2110:06SMTP-(54c8029e0000b742)221 Closing connection.
11:2110:06SMTP-(54c8029e0000b742)[u] closing socket (u)
11:2110:06SMTP-(54c8029e0000b742)[highlight=#ffff11]Info - Found 172.26.1.43 in skip list[/highlight]
11:2110:06SMTP-(54c8029e0000b742)requeuing E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\Q54c8029e0000b742.SMD R0 T3
11:2110:06SMTP-(54c8029e0000b742)finished E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\Q54c8029e0000b742.SMD status=3
11:2110:16SMTP-(54c8029e0000b742)processing E:\Program Files\Ipswitch\Collaboration Suite\IMail\spool\Q54c8029e0000b742.SMD

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Peer server in skip list?