Stopping sendmail from relaying mail for

From: Santosh Narayanan
Date: Sat Mar 27 2004 - 00:43:49 EST


I use sendmail 8.11.6 on a Redhat Linux system (kernel 2.4.20). I find that
even with relay checking enabled, sendmail is relaying email for addresses
which are formatted as follows,


where "" is my local host name.

If someone were to try relaying email to user@xxxxxxxxxxxxxx - it is
rejected as per my relaying rules. But if someone uses the "%" technique it
passes through the relaying rules and gets relayed anyway.

I would appreciate any help I could get in preventing sendmail from doing
this (perhaps even by completely stop accepting "%" in the recipient

Thanks in advance,
-- Santosh

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