Gmail: 530 5.5.1 Authentication Required. Learn more at

Question

This Go program successfully sends email from my home computer, but on a virtual server on DigitalOcean receives the following error:

panic: 530 5.5.1 Authen         


        

Answer 1

in may case setting SMTPAuth to true fixed it. Of-course you need to set permissions for "Less secure apps" to Enabled.

$mail->SMTPAuth = true;