Stefan Bauer: > Hi, > > i would like that postfix always sends DSN, when requested by client and > mail got forwarded to next-hop / final destination.
Postfix implements a published RFC, and according to that RFC, Postfix will send a 'relayed' DSN if: 1 - The sender requested DSN notification. And: 2 - The next-hop MTA does not announce DSN support, or you turn off DSN support (smtp_discard_ehlo_keywords = dsn, silent-discard). Additionally, you can tweak the SMTP conversation with smtpd_command_filter, smtp_reply_filter, and smtp_delivery_status_filter. There are examples in the documentation of those parameters. Wietse