Inbox Housekeeping, retroactive

Hello, I created an email account to use as a new location for my college email. I then used Thunderbird to move all the mail from the old account to the one I created. Is there any way to have the Inbox cleanup run on the email I moved over? I’m guessing that the archiver didnt work because the email wasn’t received in the normal way.

Thanks for your time.

You could use Webmail and have it move all of your INBOX mail to another folder, including Trash.