Notwithstanding, any "fully qualified domain name" (FQDN) can have email
sent to it; typically only the FQDN immediately below the zone cut, and
also the subject of SOA and NS records, has MX records.
But any other FQDN in the zone which has an A record should be
deliverable, if it's routable and accepting traffic from the source. If
you have joe.example.com (undelegated) and it has an A or AAAA record and
traffic from the sender can be routed to it nothing in mail or DNS
prevents delivery to it, although senders may choose not to send to it
based on local policy considerations.
On Tue, 13 Oct 2020, IL Ka wrote:
Date: Tue, 13 Oct 2020 19:06:05 +0300
From: IL Ka <kazakevichi...@gmail.com>
To: Jason Long <hack3r...@yahoo.com>
Cc: Postfix users <postfix-users@postfix.org>, "@lbutlr" <krem...@kreme.com>
Subject: Re: Mail server without MX record.
DNS server have another MX record for other mail server.
Then all mail to your domain will go to that mail server. No way to change
it. This is how SMTP works:
If one or more MX RRs are found for a given name, SMTP systems MUST
NOT utilize any A RRs
https://tools.ietf.org/html/rfc2821#section-5
You need to contact the DNS administrator. You would need DNS anyway,
because serious MTAs need SPF and DKIM: both are DNS records.
On Tue, Oct 13, 2020 at 6:53 PM Jason Long <hack3r...@yahoo.com> wrote:
I can't have MX record because the DNS server have another MX record for
other mail server.
I'm thankful if anyone tell me how can I solve my problem without MX
record. Is t possible with A record?
See top post.
[...]
On 13 Oct 2020, at 09:45, Bernardo Reino <rei...@bbmk.org> wrote:
On Tue, 13 Oct 2020, Jason Long wrote:
I have an Internet domain name and a Linux server and I want to have
an email server for send and receive emails. For example, if my
domain is "example.net" then I want to have a "i...@example.net"
address for send and receive emails from the Internet.
If you have MX for example.net then it overrides A record for example.net
domain name. But please remember that "domain name" in DNS is a
mathematical concept, it does not mean "a domain name having an SOA or
equivalently immediately below a zone cut".
--
Fred Morris
