Re: Sending bounce notification via a relayhost

[Nico Angenon]

I?ve also tried sender_dependent_relayhost_maps, it didn?t work.

Bounces have the EMPTY envelope sender address, not MAILER-DAEMON.
Instead you need to match on <>:

   empty_address_relayhost_maps_lookup_key (default: <>)
  The sender_dependent_relayhost_maps search string  that  will  be  used
  instead of the null sender address.

Thanks a lot, it works like a charm...

Nico