juan smitt:
> Hi,
>
>
> We got a request to match the envelope sender with a certain mail
> header (i.e. X-Something) on our relay servers for every outbound
> mails and reject the email if the sender and the value of this header
> don't match.
>
> It's also possible for a sender to have more than one valid X-Something value.
>
> Something like this:
> * senderdomain1.example is only valid with 'v1', 'v66', 'v99'
> X-Something header values
> * senderdomain2.example is only valid with 'v5'
> * senderdomain3.example is only valid with 'v11' and 'v546'
>
> etc, etc
>
> Is this possible with postfix?
It's not built-in, but should be possible with smtpd_milters. For
example, milter-regex allows you to define rules like:
reject "X-Something header is not valid for senderdomain1.example"
envfrom /@senderdomain1\.example$/ and not (header /^X-Something/ /^v1$/ or
header /^X-Something/ /^v66$/ or header /^X-Something/ /^v99$/)
This is not something that should be maintained by hand. Instead,
write a script that generates such rules from an easier to maintain
table.
Wietse
