etc/logrotate.d/exim4-base

   1 /var/log/exim4/mainlog /var/log/exim4/rejectlog {
   2         daily
   3         missingok
   4         rotate 365
   5         compress
   6         delaycompress
   7         notifempty
   8         create 640 Debian-exim adm
   9 }