Remove old email from dovecot

delete_old_email.sh

#!/bin/bash

MAX_DAYS=180
USER=YOUR_USER

[ -z $1 ] || MAX_DAYS=$1

LAST_DATE=$(date --date ${MAX_DAYS}' days ago' +'%d-%b-%Y')

echo "Mailbox status before proceeding:"
docker-compose exec imapd doveadm mailbox status -u ${USER} -t all INBOX

echo "Removing all emails older than ${LAST_DATE} (${MAX_DATE} days). Please wait..."
docker-compose exec imapd doveadm expunge -u ${USER} mailbox INBOX SENTBEFORE ${LAST_DATE}
echo "Done."

echo "Mailbox status after removing older messages:"
docker-compose exec imapd doveadm mailbox status -u ${USER} -t all INBOX