We are having some problems with sending and receiving email.
Some times it will go thru, some times email will be returned to the sender as "Rejected: Undeliverable" or "Rejected:Unknown User"
What do the IMail log files show when this happens?
I have gone to dnsreport.com and ran a report on our domains (safe-t.net and iol21.com) and I get a couple of warnings which I have always received. I did however see a new warning which is the acceptance of domain literals.
This one you should be able to ignore -- the test was just added last week, but it seems that a very high percentage of mailservers fail the test (including microsoft.com, for example), and there aren't many noticeable side-effects to not accepting the domain literals.
-Scott
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