[Errno 111] Connection refused

###############

Mail Server

###############

mail.backend: 'smtp’
mail.host: 'smtp.gmail.com
mail.port: 25
mail.username: 'xxxxx@gmail.com’
mail.password: 'xxxxx’
mail.use-tls: false
mail.from: ‘xxxxx@gmail.com’

But, when checking ‘Account -> admin ->’, it shows as ‘SMTP Settings’ as:

From Address: root@localhost
Host: localhost:25
Username: not set
Password: not set
TLS?: No
Mailing List Namespace: localhost

What should i do? Im new to sentry open source