Rotating mail.log daily: a problem

[Stephane Bortzmeyer <bortzmeyer@nic.fr>]

I try to rotate the mail logs of a big mail server more often than the
default (weekly).

I added this to /etc/logrotate.d :

# http://lists.debian.org/debian-devel/2003/09/msg01310.html
# sysklogd rotates file and "weekly" is hardwired in it. We add this file 
# to override it.
 
/var/log/mail.log /var/log/mail.info /var/log/mail.warn {
        daily
        rotate 52
        compress
        create 640 root adm  
        postrotate
              /etc/init.d/sysklogd reload
        endscript
}

It works but the default rotation scheme also, and it keeps rotating
every week (syslogd-listfiles --weekly). See May 16th, a saturday :

faramir:~ % ls -alt /var/log/mail.log*
-rw-r-----    1 root     adm       5098621 May 21 15:16 /var/log/mail.log
-rw-r-----    1 root     adm       2912181 May 21 06:24 /var/log/mail.log.1.gz
-rw-r-----    1 root     adm       4232280 May 20 06:24 /var/log/mail.log.2.gz
-rw-r-----    1 root     adm       3352124 May 19 06:25 /var/log/mail.log.3.gz
-rw-r-----    1 root     adm       2974079 May 18 06:25 /var/log/mail.log.4.gz
-rw-r-----    1 root     adm        936179 May 17 06:25 /var/log/mail.log.5.gz
-rw-r-----    1 root     adm          4916 May 16 06:36 /var/log/mail.log.0
-rw-r-----    1 root     adm        386548 May 16 06:19 /var/log/mail.log.7.gz
-rw-r-----    1 root     adm      26177210 May 15 06:15 /var/log/mail.log.8.gz
-rw-r-----    1 root     adm       7547207 May  9 06:25 /var/log/mail.log.6.gz
-rw-r-----    1 root     adm      38059962 Apr 25 06:38 /var/log/mail.log.9.gz
-rw-r-----    1 root     adm      64760921 Apr 23 06:29 /var/log/mail.log.10.gz

How can I suppress the default weekly rotation (which is not managed
by logrotate)?

Debian "sarge".