itan...@univ-brest.fr: > Hello, > > we're trying to use content-filter instead of > sender_dependant_relayhost_map.
Why? > This content-filter sends directly mail, no return to Postfix. When mail is undeliverable, how shall this filter send the non-delivery notification? > We're facing an issue with bounce and empty From. > > Using sender_dependant_relayhost_map, fails back to a default tranpsort. In fact, you can use empty_address_default_transport_maps_lookup_key for explicit handling of the null sender. > With a content-filter, all mails go to it, precedence That depends on how you specify the filter and how the bounce arrives. If the bounce arrives via SMTP, you can specifiy a different filter for the null sender, or override the content_filter parameter setting. Wietse