Mails not getting expired

[Tom Sparrow]

My server seems to be insisting on keeping all the emails it's ever 
received. The IMAP clients quite happily show the emails that have not 
been deleted as expected, but looking in 
/var/spool/imap/domain/e/example.com/p/user/person (for example) shows 
far more emails, going back to when I started the server up (February, 
in this case).

I've looked for relevant settings, but can't find anything that seems to 
be wrong.

/etc/imap.conf has:

deletedprefix: DELETED
delete_mode: delayed
expunge_mode: delayed

/etc/cyrus.conf has:

     deleteprune cmd="cyr_expire -E 4 -D 69" at=0430
     expungeprune cmd="cyr_expire -E 4 -X 69" at=0445

but I don't know where to look to see if these are running. I can't see 
any errors in the logs (but am unsure where these should be - cyrus 
seems to post to /var/log/maillog, is that right?)

I su'd into cyrus and ran cyr_expire manually, but it returned 
immediately with no output and didn't seem to make any difference.

On several web pages it mentions The expiration of messages is 
controlled by the */vendor/cmu/cyrus-imapd/expire* mailbox annotation, 
but I can't figure out how to list this and see if it's currently set. 
I'm not at my most confident with IMAP to be honest.


Any help?

Thanks,
Tom.
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