Setting 
Go to Admin->Backend Setting
- General Setting
- Logo Setting
- SMTP Setting
General Setting 

Logo Setting 

SMTP Setting 
Support Gmail, Sendmail and other SMTP mail services. We suggest use Mailgun to send mail.

Mail Driver: SMTP Mail Host: smtp.gmail.com Mail Port: 587 Mail Encryption: tls Mail Username: [your-gmail] Mail Password: [password-app]
(docs: https://support.google.com/mail/answer/185833?hl=en-GB)