I'm testing Orangescrum and I struggled for hours trying to use my gmail account for sending email notifications. I went through all the suggested fixes on this list and on Github...all to no avail. What finally fixed the issue was going through Google's troubleshooting for what seemed like an unrelated error. The error I was getting when using the mail send test was:
Simple Email Caught exception: Invalid email: "emailId"
Template Email Caught exception: Invalid email: "emailId"
Open-ssl was active and port 465 was open on Gmail.
What finally fixed the problem was going through Google's troubleshooting for a "Password incorrect error." Here's the link:
It seemed like the first action on the list actually fixed the problem, which unblocks a device that has previously been blocked by Gmail. I've setup dozens of project management systems using OnlyOffice, Odoo and EspoCRM and never encountered this problem before...so very odd. Anyway...thought this could help others that face this problem.
Chris Blair
Magnetic Image, Inc.
Evansville, IN