Steps to reproduce

1. Set up an autoresponder in Mail
2. Receive a mailing list email (it has a List-Id: header)

Expected behavior

No email is sent out

Actual behavior

An email is sent out

Mail app version

5.4.0

Nextcloud version

No response

Mailserver or service

No response

Operating system

No response

PHP engine version

None

Nextcloud memory caching

No response

Web server

None

Database

None

Additional info

No response