1. Start Outlook. 
2. On the Tools menu, click E-mail Accounts. 
3. Under E-mail Accounts, click 'Add a new e-mail account', and then click Next. 
4. Click IMAP as the type of account that you are creating, and then click Next. 
5. Fill out the required settings as following: 

Your Name: Your name exactly as you want it to appear to recipients when they receive email from you 
Email Address: your full email address - eg jsmith@my-domain.com 

Account Type: IMAP (recommended) 
Incoming mail server: mail.<domain> - replace <domain> with your domain name, so for example mail.my-domain.com 
Outgoing mail server (SMTP): mail.<domain> - same as the Incoming mail server 

Username: your full email address once again 
Password: your mail box password 

Ensure that 'Require logon using Secure Password Authentication (SPA) remains unchecked. This is important as you may experience difficulty sending email with this enabled. 

6. Click "More Settings..." 
7. Click "Outgoing Server" tab at the top. 
8. Mark the box labelled "My outgoing server (SMTP) requires authentication". 
9. Click "Advanced" tab at the top 
10. In the Outgoing mail (SMTP) box, type 25. *Note, if you have trouble sending e-mail, please try changing this to port 587. 
11. Ensure that both 'This server requires an encrypted connection (SSL) options are unchecked 
12. Click "Ok" to close the window. 
13. Click Next after you have completed entering this configuration information, and then click Finish