Yahoo email "search and destroy"!

[snippsat]

Section to search emails from specific_username@*.* from any domain, in all folders, and delete them.

For easier search of specific username look at(install) imap_tools

pip install imap-tools

A example i found.

from imap_tools import MailBox, A
  
with MailBox('imap.mail.com').login('[email protected]', 'pwd', 'INBOX') as mailbox:
    # DELETE messages that contains '[email protected]' in body from INBOX folder
    mailbox.delete(mailbox.fetch(A(body='[email protected]')))

Look at search-criteria.