In previous articles, we discussed how you can easily set up your own email server with iRedMail or Modoboa, or you can set up your email server from scratch. However, many folks can’t get their emails into the inbox of Gmail, hotmail or Yahoo mail, despite having a 10/10 score on mail-tester.com. In this article I’m going to show you all the tips I have that can get your email out of the recipients spam folder.
Read full tutorial here: https://www.linuxbabe.com/mail-server/how-to-stop-your-emails-being-marked-as-spam