Tweaking procmail to deliver to mbox format
To use an old-style mailbox in $HOME/.mailspool/$LOGNAME you have
to change
- the $DEFAULT variable in your .procmailrc
file.
That setting should be
DEFAULT=$HOME/.mailspool/$LOGNAME
- the $MAIL environment variable. You set
this in your .profile or .login (etc.) file as appropriate to your
shell. That setting should be
$HOME/.mailspool/$LOGNAME
Use the syntax appropriate to your shell.
Note:
This entirely disables POP clients.
It also disables IMAP and webmail, but if you are happy
with mbox format you have not been using these features in any case.