First, I think this is somewhat academic because many users will
be confused when they receive more than one notification for the
same email message, regardless of the content of that notification.
Historically, Postfix will send a "relayed" notification when the
sender requests "SUCCESS" notification but the remote SMTP server
does not announce DSN support. Otherwise, Postfix delegates the
responsibility for "SUCCESS" notification to the remote SMTP server.
Presently, we have a new feature to send a "relayed" (after delay)
notification when delayed mail leaves the local queue. If the user
requested "SUCCESS" notification, then I think that Postfix should
still delegate that responsibility to the remote SMTP server as it
has done historically.
I could remove the word "successfully" from the bounce daemon's
"success_template" text, but I doubt that it would improve most
user's experience. The problem is primarily with too many
notifications, not their content.
Wietse
