How to learn SMTP and POP3 settings from server using Plesk?

Hello,
My server running Centos 7 + Plesk 12 (64 bit)

I can send and receive mail from mail addresses defined on Plesk panel.

Question is:
- How can I learn SMTP(postfix) and POP3(dovecot) settings to send and receive mails over Gmail?

I have looked at sevices section but I can not find any configuration or settings about SMTP and POP3. I only see that they are working.