I have the following question concerning setup for multiple domains on the same host machine:
Let us say that in /etc/postfix/main.cf we have the following: mydestination = a.domain.com, b.domain.com, c.domain.com We have setup DNS so that all mx records for the above domains resolve to our host's ip address. We would like postfix, when contacted as one of the above domains, to reply to the helo smtp directive, with its respective x.domain.com name. ...e.g. like this: $ telnet a.domain.com 25 Trying xx.xx.xx.xxx... Connected to a.domain.com. Escape character is '^]'. 220 a.domain.com ESMTP helo from me 250 a.domain.com ...but if contacted as b.domain.com: $ telnet b.domain.com 25 Trying xx.xx.xx.xxx... Connected to b.domain.com. Escape character is '^]'. 220 b.domain.com ESMTP helo from me 250 b.domain.com Is this possible to setup, with one host ip address?
