Cyrus-3.0 getting rid of old message files

What does one do to permanently remove from the file system old
messages.  In cyrus.conf I have this:

postmaster    cmd="ipurge -X -f -d 8 user/postmaster/delivery" at=0420
delprune      cmd="cyr_expire -D 180d -E 3d -X 180d" at=0400

cyradm info shows this:

info
{Server Wide}
  private:
    admin: NIL
    comment: NIL
    expire: NIL
    squat: NIL
    usercounters: 0 0 0 0 0 0 0 0 0 0 0
    usermodseq: 0
  shared:
    admin: NIL
    comment: NIL
    motd: NIL
    expire: NIL
    freespace: 68182048
    most: 68182048;192015872
    total: 68182048;192015872
    shutdown: NIL
    squat: NIL

When I go to the user mailbox
(/var/spool/imap/p/user/postmaster/delivery) I see messages from
December 2018 and earlier.

When I check the maillog I see this:

# grep cyr_expire /var/log/maillog | grep postmaster
Oct  9 05:46:14 inet17 CYRUS/cyr_expire[21667]: mailbox: longlock
user.postmaster.investigate for 2.3 seconds
Oct  9 05:46:16 inet17 CYRUS/cyr_expire[21667]: mailbox: longlock
user.postmaster.mailinglists for 1.2 seconds
Oct  9 05:46:19 inet17 CYRUS/cyr_expire[21667]: mailbox: longlock
user.postmaster.spamno for 1.3 seconds

What I do not see is anything being expunged for the postmaster. 
cyr_expire is running as I see this in the maillog:

inet17 CYRUS/cyr_expire[21667]: Expired 0 and expunged 2055 out of
744420 messages from 2500 mailboxes


I want messages that are deleted and that are older than 180 days gone
from the file system entirely.  I would like to know why is this not
happening?  And, I would like to know how do I make it happen?  What
setting or settings am I missing?



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James B. Byrne                mailto:[email protected]
Harte & Lyne Limited          http://www.harte-lyne.ca
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Hamilton, Ontario             fax: +1 905 561 0757
Canada  L8E 3C3

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