How to assign domain name to Postfix Mail Server

Webmin
1
SYSTEM INFORMATION
OS type and version CentOS Linux 7.9.2009
Webmin version 1.994

We have multiple domains on the server, and we want to Emails must be sent from a domain name, not from Hostname.

Your IP address 0.0.0.0 is associated with the domain xxx.domain.com .
Nevertheless your message appears to be sent from mta1.xxx.domain.com .

How we can fix this issue… So All emails are associated with the domain.

2

@tarunmeena,

You don’t. Mail will always be sent from the servers hostname not an individually hosted domain.

3

It really shouldn’t attract any attention because it’s a typical setup. In terms of numbers, only a tiny percentage of domains host their own mail servers.

Is the mail server sending from a different IP than the domain’s A record? That’s also not unusual, but the DNS records have to reflect it.

4

update your SPF record to allow the IP and mta1.xxx.domain.com for mx

5

You would either need Postfix 3.4+ that supports SNI or a private IP address for each domain.

1 Like
6

The Postfix 3.x on GhettoForge works great on CentOS / RH 7.9 and Virtualmin. I’ve been using it for well over a year without so much as a belch, fart, or hiccup.

Richard

7

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