I will give you example how to add email account on your Mac Outlook 2013. This connection does not require extra certificate authentication from the server. It will connect with the basic authentication with your given username and password.
Here are step-by-step screen shot guidelines how to add email account on Mac Outlook 2013 version.
Assuming that you have the given information. Your web admin or email hosting provider usually provides it.
Connection Type: IMAP or POP3, I recommend IMAP for better synchronizing.
Incoming Mail Server: mail.yourdomain.com
Incoming Mail Server Port: 143
Outgoing Mail Server: mail.yourdomain.com
Outgoing Mail Server Port: 25
Step One: Click on Tools and Accounts
Step Two: Click + symbol on the Bottom left corner and click Other Emails
Step Three: Enter your email address and password.
Step Four: Continue to fill up the mail server information and click Add Account
Your email address is completely setup once you see the account appear on the left box. You can now close the dialog box and let your email synchronize and it is now ready to use.
Follow the Snap shots images for visual aids.