Add lazy_expunge to mail_plugins for imap

[pstray]

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Description

Setting up lazy_expunge does not work as intended, as the config does not load the lazy_expunge plugin for the imap protocol.  Currently the modules for imap are loaded from mail_plugins_imap, a file generated in data/Dockerfiles/dovecot/docker-entrypoint.sh

Alternatively, fix the config to use the 'mail_plugins = $mail_plugins foo bar'-syntax for extra modules in the imap and lmtp protocols (as the lazy_expunge plugin is in top-level list)

Logs:

dovecot does not produce logs for this issue.

Steps to reproduce:

1. Add config to extra.conf as mentioned on https://docs.mailcow.email/manual-guides/Dovecot/u_e-dovecot-lazy_expunge/
2. No EXPUNGED-folder is created on disk when expunging, the files just vanish

Which branch are you using?

master

Which architecture are you using?

x86

Operating System:

Debian 12

Server/VM specifications:

not relevant

Is Apparmor, SELinux or similar active?

not relevant

Virtualization technology:

not relevant

Docker version:

not relevant

docker-compose version or docker compose version:

not relevant

mailcow version:

2025-05

Reverse proxy:

not relevant

Logs of git diff:

non relevant

Logs of iptables -L -vn:

not relevant

Logs of ip6tables -L -vn:

not relevant

Logs of iptables -L -vn -t nat:

not relevant

Logs of ip6tables -L -vn -t nat:

not relevant

DNS check:

not relevant

[milkmaker]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[pstray]

Still not fixed from what i know...

[jkalousek]

Is There any ETA on this?

[milkmaker]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[apio-sys]

Indeed this doesn't seem to work as yet. There is a discussion related to this here: https://community.mailcow.email/d/4278-lazy-expunge-dovecot-plugin where several have reported it not to work as intended. It seems more of a Dovecot issue but would be great to see what the mailcow team has as experience. The guide here: https://docs.mailcow.email/manual-guides/Dovecot/u_e-dovecot-lazy_expunge/ show is as "work in progress" but then again supported as of 2024-11. Some clarification would be welcome indeed.

[pstray]

From what I can see on my installation, the feature works just fine as long as the right module is loaded, but as I initially reported, mailcow forgets to load it in the right place.

[sebastiannerz]

It works for me with the following extra.conf

# Define the .EXPUNGED mailbox
namespace inbox {
    mailbox .EXPUNGED {
        # Define how long emails will stay in this folder before they are deleted. Time is defined according to: https://doc.dovecot.org/2.3/settings/types/#time
        autoexpunge = 7days
        # Define how many emails can be kept in the EXPUNGED folder before it is cleared
        autoexpunge_max_mails = 100000
    }
}
    
protocol imap {
  mail_plugins = $mail_plugins lazy_expunge
}

plugin {
    # Copy all deleted emails to the .EXPUNGED mailbox
    lazy_expunge = .EXPUNGED
    lazy_expunge_mailbox = .EXPUNGED #see https://doc.dovecot.org/2.4.2/core/plugins/lazy_expunge.html#storage-locations

    # Exclude marked-as-deleted emails from the quota
    quota_rule = .EXPUNGED:ignore
}