Jason Hendriks on "[Plugin: WP Mail SMTP] Test email sent, form confirmed but never received the message"

Could this be the reason I'm not sending emails?

No. This email was accepted. It is sending emails.

SERVER -> CLIENT: 250 OK id=1a4bRZ-0001zt-9s

(Marked my password with XXXXX)

This password!? Z0**pN**pg** Ya, you better change it now anyway.