Creative Spammers finding out valid accounts on my mail server!

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#3604

From: Adam Jackson
Date: Thu, 11 Jul 2002 19:28

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Hi everybody,
I run a mail server that handles mail for multiple domains. Somehow, a spammer
is obtaining a list of valid mail accounts on my sendmail server and
addressing his spam messages to only those accounts. Many of these accounts
mail accounts have never been used by a person and are not posted around the
internet anywhere, which leads me to believe there is a way for an outsider to
query my mail server for a list of valid mail accounts.
Has anyone heard of this?

Thank you in advance!
Adam

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arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!sn-xit-02!sn-xit-06!sn-post-01!supernews.com!corp.supernews.com!not-for-mail

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From: ajackson@webmagic.com (Adam Jackson)
Newsgroups: comp.mail.sendmail,cz.comp.mail.sendmail,fj.mail.system.sendmail
Subject: Creative Spammers finding out valid accounts on my mail server!
Date: Thu, 11 Jul 2002 19:28:49 -0000
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