Gmail & Postfix: unencrypted emails? Yeri TieteMonday, March 7, 2016Linux, Networking, Software, wwwrootspirit, sslLeave a comment If you’re running Postfix, add this line to main.cf: smtp_tls_security_level = may Restart Postfix, and retry. PS: You can set encrypt instead of may — but this can cause issues with Amavis and/or SpamAssassin. Related