Bowie Bailey writes:
I'm still not sure what I think of the backscatter suppression logic. The idea of dropping DSNs just bugs me for some reason. Unless the rejection is due to virus or spam blocking, a DSN needs to be sent.
A DSN gets dropped only in the most extreme situations.99% of the time, the account will get fixed before the held message expires in the mail queue.
I'm also not too fond of the "456 Address temporarily unavailable" message from an over-quota account. I would much rather have the message specifically state that the user is over quota. This way the sender and recipient can figure out (and maybe solve) the problem without having to call me to ask why they are getting this error message. I would also really prefer that Courier simply not accept mail if the account is over quota.
That's exactly what happens, starting with the second message.
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