Archiving mail after a period of time

[Ed Jones]

Hello all.

I'm running procmail to sort my incoming mail into different mailboxes
(pretty much the standard use for procmail!).

I'd like to start archiving mail from these mailboxes after a certain period
(perhaps a month). Obviously, I could simply write a cron script to move the
whole mailbox file to another location, compress it and touch a new mailbox
file with appropriate permissions, but that would be a bit messy -
especially if I need to read the messages again.

So how can I move messages from one mailbox to another after they've been
delivered? I can't see how I could invoke procmail from a cron job to read
individual messages in a mailbox to check their received date - am I trying
to use the wrong tool?

Look forward to your replies.

Ed