> Please check result of 'rcorder /etc/rc.d/*'. If order of clamd and clamsmtpd
> is right, clamsmtpd may have to wait for 'real' ready of clamd.

Oh, the order is correct already. So there should be some kind of "sleep 10" in 
clamsmtpd_prestart() so that the clamd has time to properly start up.

...
/etc/rc.d/clamd
...
/etc/rc.d/clamsmtpd
/etc/rc.d/postfix
...
/etc/rc.d/freshclamd
/etc/rc.d/cron