Domino 8.5.1 mail routing problem solved
September 1st, 2010
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After upgrading our Domino servers to 8.5.1 FP2, I noticed an intermittent issue where mail to the outbound SMTP relay would simply stop. No warning, no errors, just . . . nothing. Internal mail to other Domino servers would run just fine. Restarting the router resolved the issue every time.
I thought there was a fix in FP3 related to problem messages, but that didn’t do it either.
After opening a PMR with IBM, we ended up changing two things:
- Removing the SMTPTimeoutMultiplier setting. Not sure where or how I picked that up, but messing with that is apparently only necessary in some Notes client situations.
- Disabling inbound and outbound pipelining in the global SMTP settings in the server config documents.
After restarting the server, the problem has not recurred.