SMTP Server is used to send emails. You can configure it here.

Click the "Add SMTP Config" button to add an SMTP server.
Name:
The identifier for you to distinguish this SMTP server from other SMTP server.
Sender Name:
FTP Server will use this as sender's name.
Sender Email:
FTP Server will use this as sender's email address.
Need Auth:
To prevent spam mails or other improper behaviors, some ISP will request authentication.
If your SMTP server needs authentication, tick this option and input the username and password.
SMTP Server:
Your outgoing mails will be sent from this mail server. The format shall be a domain name (e.g. smtp.mail.com) or an IP number (e.g. 231.56.789.24).
SMTP Port:
The port the SMTP server is using.
SMTP Username:
The account name is associated with authentication for the SMTP server.
Use SSL:
SMTP server requires SSL connection.