Multi-Domain DNS configuration for easy user account setup

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rotorboy
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Joined: Fri Sep 12, 2014 11:24 pm

Multi-Domain DNS configuration for easy user account setup

Postby rotorboy » Wed Apr 24, 2019 11:36 pm

Greetings,

I'm running a Zimbra server for some clients and it has about 20-30 domain names with users under each domain name. I've tried using CNAME records for things like:
pop.DOMAIN.com. IN CNAME pop.ZimbraServerName.com.
imap.DOMAIN.com. IN CNAME pop.ZimbraServerName.com.
smtp.DOMAIN.com. IN CNAME pop.ZimbraServerName.com.

Where DOMAIN = any of the extra domains on the server
and
ZimbraServerName = the actual hostname of the zimbra server.

This seems to work in one sense, in that users trying to set up programs like Outlook 365 get their settings configured automatically. The downside is that the wildcard SSL certificate only supports *.ZimbraServerName.com so they get annoying certificate warnings.

Is there a way to tell the email programs to directly configure the incoming/outgoing to use the imap.ZimbraServerName.com instead of imap.DOMAIN.com (etc.)?

I've been searching for hours on Google and nothing suitable is coming up.


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