Citeren "@lbutlr" <krem...@kreme.com>:
On 30 Apr 2021, at 01:20, Arjen de Korte <build+dove...@de-korte.org> wrote:
Citeren "@lbutlr" <krem...@kreme.com>:
When you enter your email address, it would be TRIVIAL to check
the MX records for the domain and fill those in for the SMTP and
IMAP servers, allowing users to more easily add (if needed) the
domain prefix.
No one does this.
Rightfully so. There is absolutely no guarantee that the server on
the inbound (MX) record also handles outbound and/or IMAP. In many
cases, these will be different systems.
It is very very common. It's been at least a decade since I saw a
configuration in which the SMTP/IMAP servers were on a different
domain than the MX domain.
It´s getting less and less common. I see plenty domains where e-mail
spam/virus protection is outsourced and where there is absolutely no
hope of guessing the correct hostnames for outbound or IMAP servers
based on the domain of the MX record. Configuring Autodiscover records
may help somewhat, but even then YMMV.
