You need to do the following to make your Outlook (or any mail client) use a SSL secure connection:
1. Find your server name under the 'Server & DNS' tab in your admin panel
(Alexandria80.2mhost.com in the screen shot below is just a sample. Please use the actual server name in your admin panel):
2. Use the server name as a mail server, instead of 'mail.domain' or the server IP.
*The image below shows how to change the mail server in Outlook.
3. Check the option 'This server requires a secure connection ' for incomming and outgoing mail.
* The image below shows how this can be done in Outlook (Outlook > Tools > Accounts > pick an account > properties > Advanced Tab):
Use port 25 or 26 for SMTP, and port 995 for POP3. If you use IMAP, then use port 993.