On 2022 Feb 25, at 12:05, post...@ptld.com wrote:
(The reason to do this is to make the move over seamless for the user of
that domain, and that it how their previous host had the mail setup.
Duplicating the setup means I do not have to go in and change the mail
servers on every client computer, phone, and tablet, so this is
desirable. But secure submission is required by the server at all
times, so if that gets messed up, I've gained nothing.
This seems a little confusing and maybe convoluted to me, unless im reading
this wrong.
MX records and settings in user's mail client programs are two different things. A user sending an
email from a client program like Thunderbird does not use MX records. It looks up the IP and port
of the domain saved in the "server name" and "port" settings.
On 25.02.22 12:50, @lbutlr wrote:
No, they use "mail.example.com" which normally would not exist, both for
IMAP and SMTP. If the clients do not care that the mail server is not the
mailserver, perhaps I am overthinking this.
you need to point mail.example.com to new server and install certificates
for "mail.example.com" on that server - perhaps add "mail.example.com" to
alternative names for certificate of that mailserver.
Otherwise their mail clients will complain about invalid certificate when they
connect to it.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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