[CentOS] Problem with procmail

I'm trying to setup email on a new server running CentOS-6.2 (x86_64), but for some reason email is going to /var/spool/mail/ despite the fact that my .procmailrc starts ------------------------------- DEFAULT=/var/spool/mail MAILDIR=/home/tim/Maildir/ SHELL=/bin/sh DROPPRIVS=yes ------------------------------- and I have ------------------------------- MAILER(smtp)dnl MAILER(procmail)dnl ------------------------------- in /etc/mail/sendmail.mc . (I have run /etc/mail/make and restarted sendmail .)

It is as though procmail is not running, or at least sendmail is not using it. I have the same setup on my old CentOS-5.7 server, and this seems to work fine.

Any enlightenment or suggestions gratefully received.