W2k3 sp2 domain,
1 Exch 07 server with HT,CA,MB roles + Forefront,
1 Exch 03 server with GFI MailEssentials serves as a de facto Edge Transport server but no actual ET in the Exch Org.
Mail moves in both directions internally fine; mail moves outbound to the Internet fine; Mail from the Internet is stuck and accumulating in queues on the Exch 03 server.
Connectors all appear fine but no inward flow from Exch 03 to Exch 07. The 07 Mail Flow troubleshooter tool, when run against the 03 server confirms this, when run against the 07 server finds no problems.
The only relevant info I can find in the lWindows event log is : Warning (Source MSExchange Transport; Event ID 15002) : "Inbound mail submission form the Internet, the Pickup directory, and the Replay directory has stopped. Loading of email from the queuing database, IF AVAILABLE, continues. "
MORE RELEVANT INFO JUST LOCATED:
Event Source: MSExchange ADAccess
Event Category: Validation
Event ID: 2159
Time: 2:48:05 PM
Process edgetransport.exe (PID=2920). Configuration object CN=MAIL-XMAIL,CN=Connectio
t Routing Group,CN=Routing Groups,CN=First Administrative Group,CN=Administrative Groups,CN=ExchOrg,CN=Micro
n,DC=org read from domaincontroller1.domain.c
om failed validation and will be excluded from the result set. Set event logging level for Validation category to Maximum to get additional events about each failure.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp
. (MS Link was dead end.)