UnSpam Me
Unsubscirbes from newsletters, mailing lists and so on.
...://www.pop3-imap-smtp.de/gmx/
Web.de:
https://hilfe.web.de/pop-imap/imap/imap-serverdaten.html
Please note: some providers do block mass sending of mails. In that case, please run the program several times, deleting all mails you dont want to be processed each time.