Enabling Secure Connections in Outlook 2010
1- On your computer, click the Start Menu and select Control Panel.
2- Double-click the Mail icon to open it.
3- Click on E-mail Accounts.
4- Select your HIS-hosted email account and click Change.
5- Click on More Settings.
6- Click the Advanced tab.
7- Change to secure ports:
For IMAP: Enter port 993 as the Incoming server port.
For POP: Enter port 995 as the Incoming server port.
Make sure that SSL/TLS is chosen from the Use the following type of encrypted connection drop-down box.
For Outgoing server (SMTP) Enter port 587 with STARTTLS or 465 with SSL as the port and choose from the drop-down box next to Use the following type of encrypted connection.
8- Click OK.