Postfix mail routing depending on 'From:-field

Hi postfix-fans,

is there a chance to route mails depending on their 'From:'-fields?

Background:

I'm using multiple mail accounts of multiple freemailer. But more and more
mailservers refuse mail coming from my IP-range (which seems to be
populated with SPAM-senders). It would be possible to route all mails to
only one of the freemailers but mails with "incorrect" (=not matching the
freemailer's domain) 'From:'-Lines would be dropped.

Thanks in advance,

Frank

Frank Burkhardt wrote:

> Hi postfix-fans,
>
> is there a chance to route mails depending on their 'From:'-fields?
>
> Background:
>
> I'm using multiple mail accounts of multiple freemailer. But more and more
> mailservers refuse mail coming from my IP-range (which seems to be
> populated with SPAM-senders). It would be possible to route all mails to
> only one of the freemailers but mails with "incorrect" (=not matching the
> freemailer's domain) 'From:'-Lines would be dropped.
>
> Thanks in advance,
>
> Frank

No - you have to define a standart relay host.
Some providers do a so called reverse lookup first before they allow to
send mails. That's also a reason because your mails get refused.