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Relay of foreign mail

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Is there a way to stop foreign mail arriving at my server from being relayed back out to the internet as though it was sent from my system? Have a Sun Netra i as our mail server and we have bulk mailings being relayed off of our server. Some one stated that I should just turn relay off, but unclear has how to do it, and if I do will my mail clients still be able to send e-mail out to the internet?

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Relay of foreign mail

In reply to Relay of foreign mail

I will guess you are using the sendmail that came with Solaris. Here is how to configure it:
http://www.sendmail.org/m4/anti-spam.html

And your users should not be impacted.

Good Luck, and thanks for helping to keep the spammers away!

Relay of foreign mail

In reply to Relay of foreign mail

Using Sun sendmail 8.6, is there some specific help on this version that you are aware of?

Relay of foreign mail

In reply to Relay of foreign mail

The site your first answer gave you was great and a good place to start.
BUT when I was looking for a fix for the spammers, I went to this page on the same Sendmail.org site:
http://www.sendmail.org/antispam.html

There are a list of great references on that page, which lead me to this page:
http://www.sendmail.org/%7Eca/email/check.html

And better yet this page, that basically told me I should upgrade to 8.9 (which I did):
http://maps.vix.com/tsi/ar-fix.html#sendmail_8

Good luck!!! And I’m in agreement with your first answer again with a THANK YOU for stopping SPAM. 🙂

Relay of foreign mail

In reply to Relay of foreign mail

Do not want to do an upgrade, no real knowledge of Unix, is there any place to find config options for ver 8.6

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