From: Barney Desmond (barneydesmondgmail.com)
Date: Sat Dec 13 2008 - 05:05:54 CST

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Ville Walveranta wrote:
> So I'm wondering if it would be possible to accept the mail, blackhole it,
> and send a bounce-message to the sender with a "User unknown" message.
> User-specific blackholing seems to be easy to implement, but how about the
> "user unknown" bounce message? I'd like to be able to "actively notify"
> (with a bounce) the sender about non-existence of some old accounts.

It sounds like you just want an autoresponder, something like procmail
and/or vacation will probably do what you want. You'll still have to
explicitly accept mail for those users and deal with it. Note that this
is *not* "bouncing", that's the last thing you want, as it can easily
cause backscatter. Similarly, you should be very careful with any such
autoresponder that you setup for this.

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