dovecot - Mar 2020 - Getting autoexpunge to work

dovecot 2.2.33.2 (d6601f4ec) on Ubuntu 18.04

The recent announcement that expunge is going to be deprecated and
that autoexpunge should be used instead reminded me that my recent
switch over to autoexpunge is not working.

There has been an active discussion today about getting expunge
working so I thought I'd use the commands suggested there to figure
out why autoexpunge might not be doing anything.

"doveadm search -u local-finance-support mailbox INBOX savedbefore
12w" returns nothing even though the first email for that user is
dated November 12th 2019.

Using the message ID for that first email, I then tried this:

doveadm search -u local-finance-support HEADER MESSAGE-ID
"CAHgKB_f5ttC3kLgxgZiNzwyySvUfb-NXodqZ7K3+dkHKCOUwhg at
mail.gmail.com"

f55e9737e270c2564d1a0000e171d23e 37

then

doveadm fetch -u local-finance-support "mailbox date.saved" UID 37

mailbox: INBOX
date.saved: 2020-03-17 14:34:12

Why on earth is dovecot showing today's date for that message? What
have I misunderstood or misconfigured?

Regards

Philip

> On 17 Mar 2020, at 16.42, Philip Colmer <philip.colmer at linaro.org>
wrote:
> 
> doveadm fetch -u local-finance-support "mailbox date.saved" UID
37
> 
> mailbox: INBOX
> date.saved: 2020-03-17 14:34:12
> 
> Why on earth is dovecot showing today's date for that message? What
> have I misunderstood or misconfigured?
Depends a lot on what is your mailbox storage driver.

Sami

On Tue, 17 Mar 2020 at 15:47, Sami Ketola <sami.ketola at dovecot.fi>
wrote:
>
>
>
> > On 17 Mar 2020, at 16.42, Philip Colmer <philip.colmer at
linaro.org> wrote:
> >
> > doveadm fetch -u local-finance-support "mailbox date.saved"
UID 37
> >
> > mailbox: INBOX
> > date.saved: 2020-03-17 14:34:12
> >
> > Why on earth is dovecot showing today's date for that message?
What
> > have I misunderstood or misconfigured?
>
> Depends a lot on what is your mailbox storage driver.
How do I determine what that is, please? I've included the output of
doveconf -n below.

Philip

# 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.21 (92477967)
# OS: Linux 4.15.0-1041-aws x86_64 Ubuntu 18.04.3 LTS
auth_username_format = %Ln
auth_verbose = yes
disable_plaintext_auth = no
listen = 127.0.0.1
mail_location = mbox:~/mail:INBOX=/var/mail/%u
mail_privileged_group = mail
mailbox_list_index = yes
namespace inbox {
inbox = yes
location mailbox Drafts {
special_use = \Drafts
}
mailbox INBOX {
autoexpunge = 12 weeks
}
mailbox Junk {
special_use = \Junk
}
mailbox Sent {
special_use = \Sent
}
mailbox "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
special_use = \Trash
}
prefix }
passdb {
driver = pam
}
protocols = " imap lmtp"
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0600
user = postfix
}
}
ssl = no
ssl_cert = </etc/dovecot/private/dovecot.pem
ssl_client_ca_dir = /etc/ssl/certs
ssl_key = # hidden, use -P to show it
userdb {
driver = passwd
}
>
> Sami
>