I'm trying to create a mail flow rule which will delete emails whose subject header is utf-8 encoded. What this means is that the email subject would start with
=?utf-8?
However, I can't seem to create a rule that does this. I Tried:
Subject matches these text patterns ... '=\?utf-8\?'
also tried
A message header matches ... 'Subject' header matches '=\?utf-8\?'
However, both doesn't work. Any ideas or help would be much appreciated.
Thanks!