I am using Service Desk Plus: On Demand and I am having an issue with sending an email out in reply to a request. When I press the "Send" button I get the error message "Mail sending failed.". I am using Gmail as our mail server and the information I have input into the Service Desk Plus: On Demand mail settings are below.

Server Name/ IP Address: imap.gmail.com

User Name: <User Name>

Password: <Password>

Email Address: <Email>

Email Type: IMAPS (Port 993)

TLS: Checked

Fetch Mails Every: 2 Minutes

Accept E-Mails from unknown users: Checked

Any help would be greatly appreciated.