Issue Cant send emails from my mobile and cant setup on gmail

[hamza-24]

Server operating system version

centOS 7

Plesk version and microupdate number

18.0.50

hey i have tried to setup my email hosted in plesk on gmail but it gives error cant establish connection. but I can make add in outlook but the issue is I can receive emails but cant send emails. sometimes the incoming emails are missed too

 

[scsa20]

I am not understanding what the issue is. What ports are you using when setting up the email? Does web mail work?