Peter Andersson writes:

The mail log says that the mail gets delivered but i canīt find it
anywhere.
Courier stores mail in a clever queue mechanism and may
hold it there for a while. Just run `mailq` to check.

If it's not there nor in user's box, chances are it was
forwarded (depending on DNS MX and related settings)
or gone for good.

I also wonder if there are any easy way to make the server delete all
incoming email for non-existent users. As you know some spammers email
non-existent users with a bogus "from header"
add a "badfrom" line to your bofh file, for syntax see
http://www.courier-mta.org/courier.html

I would hate to have that happen to me.
Unfortunately, most anti-spam methods require someone
actually does "spam-surfing" to check any overworked names.

Hmmm... perhaps Peter was asking how to avoid getting
bogus DSN, not how to convert them into a hot names list,
UH?

Some mechanism could catch messages with multiple failures
and check for repeated "from" header. Some other mechanism
should check the logs and discard unused bofh entries after
some time. Anybody implemented anything like this?

Ciao
Ale



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