MailScanner & CentOS5/Sendmail

[Henry Kwan]

Gerard Cleary <gcle <at> smcaus.com.au> writes:

> Our system uses Centos 4.5 and Sendmail.
> /var/spool/mqueue has modes 700 and ownership root.mail
> /var/spool/mqueue.in has modes 700 and ownership root.root

Whoops.

After looking at MailScanner.conf again, I realized my mistake.  I had set "Run
As User" and "Run As Group" to "mail".  Didn't even see the "(not normally used
for sendmail)" bit a couple of lines up.  After unsetting them, everything is
working now.

After sending a few test emails, I noticed that MailScanner/sendmail doesn't
reject unknown users at the SMTP stage but rather it accepts the email for
delivery and then a DSN is generated afterwards.

How do you get sendmail to reject at the SMTP stage like postfix does with
"relay_recipients.db"?

Thanks.