> Date: Tuesday, October 13, 2020 12:09:28 +0000
> From: Jason Long <hack3r...@yahoo.com>
>
> Hello,
> Can I use Postfix without MX record? I installed Postfix
> and Dovecot via "https://wiki.centos.org/HowTos/postfix"; tutorial
> and I want to know can I use it without MX record?
Yes. Some mail sites, incorrectly, think that one has to have an
MX-record for a site to be legit, but major ones know better. An
MX-record is related to inbound routing/deliverability, and not
specific to the MTA one is using.
You do need an A-, and for successful outbound deliverability, a
matching Rdns record. As noted in an earlier message chain, there is
a list of other things, e.g., SPF, DKIM, DMARC records, etc., that
will help in deliverability.
By the way, the documentation that you pointed to specifies that it
is written for Centos-5. As Centos-6 is EOL next month, C5 and
earlier are already EOL. So you should be using at least Centos-7,
and relevant documentation. Something in one of your messages
yesterday indicated that you were likely using Centos-6 or earlier.
