Feingeist Software announces MailButler, an important update to the popular Apple Mail add-on for macOS. Among the various functionalities, version 6407 introduces the new time-saving Unsubscribe feature. Now, if a MailButler user doesn't want to receive a newsletter anymore, he or she just needs to press the unsubscribe button, which appears at the top of the email. MailButler will automatically unsubscribe the user from that newsletter. MailButler is Free and can be downloaded from their website.