tried using the plugin with google apps but its not

tried using the plugin with google apps but its not working. I tried ports 25, 587 and 465.

I know you guys will ask me to check if the ports are open. How do i check that?

I have no problem using my email clients with those ports.

I wanted to show you the screenshots but there's no way i can attach my screenshots here.

The link is here: https://premium.wpmudev.org/forums/topic/setting-up-enewsletter-with-gmail-account?replies=12#post-513687