I have a hosting client whose is having trouble connecting to the MX record of a vendors mailserver. It is seeing the "A" record not the MX record and connecting to the website versus the mailserver for the vendors email information.
There are some versions of IMail that would incorrectly go to the A record if the MX record did exist, but IMail couldn't reach the mailservers from the MX record. You seem to be running 6.06, which I believe was one of the versions that had this problem.
This server had multiple domains and is working fine for all the other domains. The DSN records pulled from the nameserver come back correctly.
Wherw does IMAIL get its DNS information from. I checked the DNS server setting in SMTP and it is correct? I checked the vendors DNS and it is correct.
How familiar are you with DNS? Did you use an automated tool (such as http://www.DNSreport.com )? In this case, I would guess the problem is a mistake on their end that combined with the incorrect A record usage of IMail. Some people think it's funny to use private IPs in their MX records, or to have their primary mailserver never respond.
-Scott
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