Hana & Sarah’s blog

By default, Redhat & Fedora comes with smrsh activated.
In order to forward an email to a handler program, the handler program must be in /etc/smrsh (I am not sure if link is sufficient)

Refer to /etc/mail/sendmail.mc
Below line means that smrsh is used.

FEATURE(`smrsh',`/usr/sbin/smrsh')dnl

/etc/aliases

localemail:  |/etc/smrsh/mailhandler.sh

run newaliases to update the aliases db.

Also the /etc/smrsh/mailhandler.sh should read the input from the STDIN.

If you want to activate sendmail (SMTP) Server…

/etc/mail/sendmail.mc file

uncomment by adding dnl in front of below line

DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
</lang>
So it becomes
<pre lang="none">
dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl

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Rule:
1. Block all query
2. Allow query for each local zone
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