System
SMTP configuration

Enabled
If this is set to "No", no emails will be sent from the application.
Host
The SMTP host. This is set to "localhost" by default.
Example
Use "smtp.gmail.com" if you want to use Gmail.
Port
The SMTP port. This is set to "25" by default.
Example
Use "465" when using Gmail.
Username and password
The username and password used to authenticate with the SMTP server. This is set to empty by default.
Automatically enable TLS
Set this to yes if you want to use TLS by default.
Verify peer
Verifies the peer's certificate.
Note
You would usually set this to "Yes", unless you're using a self-signed certificate.
Peer fingerprint
Enforce peer fingerprint verification by specifying it here as a SHA1 or MD5 hash.