crontab -e
59 23 * * * /usr/sbin/pflogsumm -d today /var/log/mail.log | mail -s "pflogsum daily Report `date`" log@DOM.TLD
0 1 * * mon /usr/sbin/pflogsumm /var/log/mail.log.1 | mail -s "pflogsum weekly Report `date`" log@DOM.TLD
59 23 * * * /usr/sbin/pflogsumm -d today /var/log/mail.log | mail -s "pflogsum daily Report `date`" log@DOM.TLD
0 1 * * mon /usr/sbin/pflogsumm /var/log/mail.log.1 | mail -s "pflogsum weekly Report `date`" log@DOM.TLD