Thunderdird doesn't respect folder limit size for pop3 protocol

Checklist

• I have used the search function to see if someone else has already submitted the same bug report.
• I will describe the problem with as much detail as possible.

App

Thunderbird for Android

App version

12.1

Where did you get the app from?

F-Droid

Android version

10

Device model

Titan

Steps to reproduce

Thuderbird has folder limit that user can set. The menu gives the option of limit local folder size to 10/25/50/100/250/etc messages.
Unfortunately Thunderbird doesn't delete old messages from folder, so with pop3 account the local folder grows to a huge number of emails, but after a big number Thunderbird becomes too slow to manage them.
It seems Thunderbird ignores that option.

Expected behavior

Respect the folder message limit deleting older messages

Actual behavior

All messages remain without control.

Logs

No response

Begin by reproducing the POP3 case in Thunderbird for Android 12.1 with the folder limit set, using the stated Android 10 and Titan environment if available. Confirm completion when older messages are removed and the folder remains within the selected message limit.