On Sun, Jul 26, 2015 at 07:59:48PM +0200, DTNX Postmaster wrote:
> Make everything 'zed.grinta.net', forward and reverse, including your
> MX record, and create CNAME records for your convenience, such as mail
> client configuration. If you need an A apex record, just create that
> separately, don't use it for sending mail.
Read that carefully, the hostname in the MX record SHOULD NOT be
a CNAME:
Good:
example.com IN MX foo.example.com.
foo.example.com. IN A 192.0.2.1
Not good:
example.com IN MX foo.example.com.
foo.example.com. IN CNAME bar.example.com.
bar.example.com. IN A 192.0.2.1
The second form is tolerated by most MTAs, but violates RFC
reqirements to avoid CNAMEs on the right hand side of MX records.
--
Viktor.
