I started to run a self-hosted mail server which I want to be reachable via a subdomain only. I have an A record for mail.sub.domain.tld
and an MX record for sub.domain.tld
/edit: which points to mail.sub.domain.tld
. (I also set up spf, dkim and dmarc TXT records for sub.domain.tld
, dkim._domainkey.sub.domain.tld
and _dmarc.sub.domain.tld
respectively)
I have a couple of servers which I want to use with the domain. Could it be a problem for the acceptance of my email by other servers if the A record for sub.domain.tld
points to a different ip as mail.sub.domain.tld
?
What about if the same is true for domain.tld
and foo.sub.domain.tld
? I think at least the last one should be possible but I'm not super-confident in my understanding of DNS in general.