Mailing List Message #105788
From: Roberto Michelena <>
Subject: correct usage of SSL certs
Date: Tue, 25 Aug 2015 10:41:33 -0500
To: CommuniGate Pro Discussions <>
X-Mailer: Apple Mail (2.2104)
Hi list,

I don’t fully understand if the SSL certificate has to be issued for the domain ( or the specific host ( ; it seems it makes a difference for IMAP but maybe not for SMTP ?

Also, I don’t know how it should be done when the MX record is set up as a CNAME to the real server, as in:
MX records for point to ; “A” records for point to CNAME ; whose “A” records do point to an IP address.
So the SSL cert should be for “” or for “” ?

case in point: when I went on to finally buy real SSL Certs (as the self-signed were rejected by everyone), I was first about to buy for and during the process it said it would apply to “  AND” which sounded ridiculous so I finally decided to buy for “” which would apply to “ AND”

Now it seems to be working for incoming SMTP (I don’t see new errors); but for IMAP my mail client balks at it saying that the SSL Certificate is for “” and not for “”; also I don’t know how well might it be working for SMTP out…
and the CNAME situation might even complicate things more?
(nevertheless in the SPF records, “” is also listed)

Roberto Michelena

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