FW: Spam/3rd Party Relay

[Hal <hal () mrj com>]

I made that thoughtless beginners mistake of saying SMTP ==  sendmail. Sorry. 

Hal.

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From:  Hal[SMTP:hal () mrj com]
Sent:  Friday, June 12, 1998 11:17 AM
To:  'firewall-wizards () nfr com'
Subject:  Spam/3rd Party Relay


A fix is available for Sendmail that shuts off the 3rd party relay function
preventing spam operators from using your site as a relay dump.  Mail hubs 
are commonly behind the firewall and the spam operator hits the fw mail  proxy first.  Some current and older 
commercial FW products don't disable 3PR and spamming is possible off those sites. Which firewalls do block spamming?   
I tested a small number of FW and found they are not anti-span. Am I correct to assume that commercial  FW vendors are 
upgrading their products to disable 3PR ?  Are there some relatively straightforward mods to sendmail.cf  to disable 
3PR in older FWs?

Regards Hal
hal () mrj com