RE: [LUG] sendmail rejects

["Julian Hall" <linux@xxxxxxxxxxxx>]

-----Original Message-----
From: owner-list@xxxxxxxxxxxx [mailto:owner-list@xxxxxxxxxxxx]On Behalf
Of Adrian Midgley
Sent: 09 July 2004 12:54
To: list@xxxxxxxxxxxx
Subject: Re: [LUG] sendmail rejects

> There is the slight problem that bouncing confirms there are actually some
> real addresses around the dud one.

Wouldn't that depend on the wording of the bounce?

e.g. Unknown user would mean the domain exists but the user doesn't, whereas
Unknown Host/Domain would mean the entire network was non-existent.

For example if I were a spammer and sent a mail to anybody@xxxxxxxxxxxx and
got a bounce back saying (and I forget the exact wording) something to the
effect that there is no mail server active on that domain I would give up
and move on.  If I got a bounce saying "Unknown user" then I may be inclined
to be more persistent.

Mind you I've been out of Tech Support now for the thick end of 5 months and
happily forgetting a lot of what I once knew, so maybe I'm talking rubbish
:)

Kind regards,

Julian
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