If the non-existant users are the same 5 or 6 names you might just put lines in /etc/aliases such as xyz: /dev/null and run newaliases. Greetings, E. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Erwin Rennert, Center for Social Innovation Austria, Europe erwin@zsi.at On Mon, 1 Jan 2001, Luis Oliveira wrote:

Thanks for the info, but is it possible to reject mail if the user doesn't exist in the mail server ? The sender always uses yahoo and hotmail. I cannot reject mail from those domains because people here receive messages from there (newspaper business you know). Anyway I'm going to check postfix.

TIA

// luis oliveira

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Implement filterings using orbs or maps. www,mail-abuse.com. Also you may want to switch to postfix. Seee www.postfix.org/ press links (they link to 2 of my articles which have some content on why postfix is so damn good =).

Kurt Seifried, seifried@securityportal.com SecurityPortal - your focal point for security on the 'net

----- Original Message ----- From: "Luis Oliveira" To: Sent: Sunday, December 31, 2000 12:45 PM Subject: [suse-security] How can I solve this problem with mail server

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Hi to all,

My company mail server is running on a Suse 6.3 system, with sendmail 8.9.3, and until sotime ago everything was running beautifully.

What happened is that we started to receive mail messages with links to porno sites. These mail messages are always addressed to non existant users in the mail system. We have tried to configure sendmail by way of webadmin to reject mail from the source addresses but the source adress is always changing. Is there any security problem with Suse 6.3 and/or sendmail that can cause this ?

What can I do to solve this?

Thanks in advance

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