Server Fault Asked on November 4, 2021
I have a mail server on mail.domainA.com
which is working absolutely fine if I send email to [email protected]
. I then configured a second domain (domainB.com) in bind9 (same server) to use mail.domainA.com
as the mailing server. However, when I send email to [email protected]
I see no logs in POSTFIX, so its like their is no contact with the mail server.
Note: I am using Cloudflare. So even if I expose mail.domainA.com
my mailing server, still there is nothing in logs, somehow domainB.com
is not contacting mail.domainA.com
.
My bind9 configuration for DomainA:
; MX Record
domainA.com. IN MX 10 mail.domainA.com.
; A record for nameserver
@ IN A 1.1.1.1
mail IN A 1.1.1.1
domainA.com. IN TXT "v=spf1 a mx ip4:1.1.1.1 ~all"
mail IN TXT "v=spf1 a mx ip4:1.1.1.1 ~all"
My bind9 configuration for DomainB:
; MX Record
domainB.com. IN MX 10 mail.domainA.com.
; A record for nameserver
@ IN A 1.1.1.1
mail IN A 1.1.1.1
mail IN TXT "v=spf1 mx a ip4:1.1.1.1 ~all"
domainB.com. IN TXT "v=spf1 mx a ip4:1.1.1.1 ~all"
I also have the same setup on cloudflare.
My postfix (main.cf) config file:
myhostname = mail.domainA.com
mydomain = domainA.com
myorigin = domainA.com
virtual_alias_domains = domainA.com domainB.com
There was no PTR record for domainB.com
, as soon as I added the PTR record, i was able to see the connection in logs.
Also I had to expose the mail.domainA.com
in Cloudflare.
Answered by nix on November 4, 2021
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