Wes Morgan <firstname.lastname@example.org> in response to my saying:
>>Can't do this without changing the standard first -- this is a defined
>>feature of SMTP-based mail systems. Probably hopeless.
>This is true, but...
>Nothing stops you from refusing SMTP connections from domains which
>harbor spammers [ other good comments removed ]
True but irrelevant. You can do this without modifying SMTP or
sendmail. Simply grab one of the rule-based SMTP proxies such as
that which comes with socks or the TIS firewall kit, and install it
in front of sendmail.
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