[Dovecot] Deleting mail accounts older than 6 monthes

Hi,

i have a mail server with many users and i am using dovecot as pop3 server. I was wondering if there is a way to detect the last date each user logged in to the server for retrieving his mail.

I need to delete the users that has not logged in to their accounts the last 6 monthes.

Many thanks for any help.

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