I am moving my email from Mailsmith to MailMate. SpamSeive license was baked in with Mailsmith. I’m presuming I will need to purchase a license to work with MailMate, but thought it better to ask than to presume.
SpamSieve licenses received along with a Mailsmith purchase are full licenses. You can just keep using the app with other mail clients, and it will continue to use the same license and training data.