How does IMAIL generally function when the MX record for the receiving domain is an IP addresss and not a hostname ?
It will not deliver mail to it (or at least most versions of IMail). That is the correct behavior per the RFCs.
I just had such a case and it turned out that it was trying to connect to the A-Record and I was getting an unknown user error. Why would it go to the A-Record and not just attempt to deliver to the IP directly ?
Because the domain is broken. Any domain with an MX record that is an IP rather than a hostname is broken. Since there is no valid MX record, IMail is apparently trying the A record (which I believe is acceptable, as it *should* try the A record if there is no MX record).
Also, I did a lookup on dnsreport.com for the domain in question and the following came up:
"could not connect without GLUE or A Record"
What does this mean?
What is the domain?
-Scott
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