Rajesh M:
> ello
>
> we are a corporate email service provider only transactional / business
> emails.
>
> Once in a while under rare occasions due to customer's email id getting
> compromised our server's primary ip gets blacklisted in spam databases.
>
> So the question is
>
> Can we change the outgoing mails' ip address in POSTFIX during such rare
> occasions only for OUTGOING emails, while having the MX ip without any change.
>
> all our services smtp, pop and imap are in the same server.
Set up a dedicated SMTP client in master.cf with a unique
smtp_bind_address and smtp_helo_name that matches that IP address.
smtp-1.2.3.4 unix - - n - - smtp
-o smtp_bind_address=1.2.3.4
-o smtp_helo_name=helo-for-1.2.3.4
Then configure sender_dependent_default_transport_maps, returning
that dedicated SMTP client.
Example entry:
sen...@example.com smtp-1.2.3.4:
(or "@example.com smtp-1.2.3.4:" for all senders in a domain).
Wietse
