Ah, I just wanted to hide the IP, nothing important~.
> I suppose, the log excerpt shown above describes a message that
> was rejected by your backup MX.
> If so, everything is OK: Your backup MX does _not_ accept the message
> because it "spam-scored" too high. As _your_ server did _not_ accept
> it, the MTA on the other side has to deal with sending a bounce
> message.
Hum, the log is from the backup MX, but the backup MX doesn't score spam
(the main MX does).
So it goes like this:
1- incoming SMTP to backup MX: delivered (so you can consider that the
message has been accepted here).
2- outgoing SMTP from the backup MX to the main MX: 550 rejected (spam
score too high).
3- bounced back from the backup MX to sender (or frozen).
At situation 3, I want the email to be deleted (instead of being frozen or
bounced back). I guess it is possible with a router condition.