[CentOS] close open relay

Jerry Geis geisj at pagestation.com
Wed Nov 12 20:33:11 UTC 2008

hi all, running centos 4.7 i686.

I seem to have an o pen  r elay sendmail server.
How do I close it?

I have the STRAIGHT centos install sendmail.mc file.
Only thing I changed was:
dnl DAEMON_OPTIONS(`Port=smtp,Addr=, Name=MTA')dnl

so as to allow incoming email and not just localhost. however this seems 
to relay everyone.

I looked at http://www.sendmail.org/tips/relaying but it just talks 
about (AFIKT)
enabling specific relays to occur - not how to CLOSE the relaying.

How do I close the relay?


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