sandermo...@telenet.be:
> After some googling I found that the "reject_unknown_sender_domain"
> option should reject mail if Postfix isn't the sender's domain
> final destination so that sounds good too. I enabled that option
> but it doesn't seem to work?
It works as promised.
reject_unknown_sender_domain
Reject the request when Postfix is not final destination for the
sender address, AND THE MAIL FROM DOMAIN HAS 1) NO DNS MX AND NO
DNS A RECORD, OR 2) A MALFORMED MX RECORD [...]
Have you considered using sender access control on the outbound
SMTP server:
smtpd_sender_restrictions =
check_sender_access inline:{
example.com OK
other.example OK
}
reject
This requires that you have different mail servers for inbound
and outbound SMTP.
Wietse
