cakequeen on "[Plugin: Postman SMTP Mailer/Email Log] WordPress (or another plugin) is currently handling email delivery, not Postman."

Ok gotcha. Thanks for your help!

If they refuse to do anything about it, is there another smtp plugin I could use or will this be an constant issue?

I was using WP Mail SMTP and that just stopped working the other day, which is why I'm trying to get your plugin to work.