Stefan Seidel:
> This forwarding to external addresses however, makes my Postfix create
> backscatter. Example:
> hijac...@yahoo.example.com sends email to u...@mysystem.com ->
> virtual_alias_maps says: deliver it to interestedpa...@gmx.example.com
> However, the mail server at gmx.example.com may sometimes reject the
> message for any reason, which causes my Postfix to generate a bounce
> message to hijac...@yahoo.example.com - which is obviously not something
> anyone would want.
There are two options that I am aware of.
1) Add support to predict the future, so that Postfix can predict
that a down-stream MTA would reject a forwarded message. Please
keep me updated of any progress that you are making in this area.
2) Don't forward SPAM.
Other options involve loss of legitimate mail by dropping non-delivery
notifications for forwarded mail, which I cannot recommend.
Wietse
