Since changing my email provider to mail.com, many of the messages come in marked as spam. I can change them back using the "Classify as NOT spam" filter, but the spam tag (e.g. "****SPAM(5.0)****") remains in the message's subject line. I have tried creating a filter to rewrite the header line, using regex
to an empty string, but it does not change the Subject header. Apparently I'm doing the wrong thing. What is the right way to do this?