Thank you for your response. For clarity, this issue has been present
for several weeks now.
warning: SASL: Connect to Dovecot auth socket 'private/auth'
failed: REASON FOR FAILURE HERE
I do not have this warning in the logs.
Can you try these commands:
postconf "max_use = 10"
postfix reload
postconf "default_process_limit = 100"
postfix reload
I will run the different commands during our morning low load time and
report the results.
warning: SASL: Couldn't send handshake: REASON FOR FAILURE HERE
I have not seen this warning either.
It may be worthwhile to search the log for warning: messages. They
are much more useful than debug logging.
Debug logging was my last resort, last week.:)
How many submission processes are configured to run?
For submission, maxproc is set to 550 to avoid the following type of
warning:
"warning: service "submission" (101) has reached its process limit
"100": new clients may experience noticeable delays."
Postfix:
default_process_limit = 300
Dovecot:
default_process_limit = 400
It may be possible that you're running out of file handles,
either the kernel limit, or the per-process limit.
I will monitor these.
Thanks,
Stuart
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