If sendmail doesn't know where to deliver the mail, it should bounce 
it.  In fact, that's the normal behavior.  When the mail gets bounced, 
Postmaster will get a notification, and that notification is typically 
in multi-part MIME and includes the original message as an attachment. 
You might consider using the PostmasterCopy option to route those 
bounces through a filter that discards things you absolutely don't care 
about and perhaps trim the body of those you do.  Or you might set 
mailer-daemon to /dev/null.  If you have the O'Reilly Sendmail book, 
2nd edition (the "bat" book -- does that make Eric Allman Batman?), 
look at sections 24.4.1 and 24.4.2, pages 404-406.  The same material 
is probably in the 1st edition too, I just don't know the page numbers.

-- Rob

--On Thursday, March 15, 2001 06:42:56 PM -0700 Josh Miller 
<[EMAIL PROTECTED]> wrote:

> Do I have to accept e-mail for unknown users? or can I have sendmail
> check that the user actually exists when e-mail comes in? If so...is
> there documentation on doing this anywhere?
>
> I remember seeing something about this on this list quite awhile ago,
> but I can't find it by searching the archives by any keywords I can
> think of...
>
> -
> Josh
>




       _ _ _ _           _    _ _ _ _ _
      /\_\_\_\_\        /\_\ /\_\_\_\_\_\
     /\/_/_/_/_/       /\/_/ \/_/_/_/_/_/  QUIDQUID LATINE DICTUM SIT,
    /\/_/__\/_/ __    /\/_/    /\/_/          PROFUNDUM VIDITUR
   /\/_/_/_/_/ /\_\  /\/_/    /\/_/
  /\/_/ \/_/  /\/_/_/\/_/    /\/_/         (Whatever is said in Latin
  \/_/  \/_/  \/_/_/_/_/     \/_/              appears profound)

  Rob Tanner
  UNIX and Networks Manager
  Linfield College, McMinnville OR
  (503) 434-2558 <[EMAIL PROTECTED]>

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