archivemail is a tool for archiving and compressing old email in mailboxes.
It moves messages older than the specified number of days to a separate mbox format mailbox that is compressed with gzip. It can also just delete old email rather than archive it.
Enable snaps on Raspberry Pi and install archivemail
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Enable snapd
On a Raspberry Pi running the latest version of Raspbian snap can be installed directly from the command line:
sudo apt update
sudo apt install snapd
You will also need to reboot your device:
sudo reboot
After this, install the core snap in order to get the latest snapd:
sudo snap install core
Install archivemail
To install archivemail, simply use the following command: