To set up iPhone for IMAP, do the following:

1. Tap Settings.
    
   
2. Tap Mail, Contacts, Calendars.
3. Tap Add Account.
4. Tap Other.
5. Tap Add Mail Account.
6. Enter the following information in the spaces provided:
   • Name—Enter your first and last name. This is the name that will appear in the From field of messages you send.
   • Address—Enter your entire email address (e.g., myname@mydomain.com).
   • Password—Enter the password for your email account.
   • Description—Enter a descriptive name for the account (e.g., Work Account). This description will be visible only to you.
7. Tap the Save button.
8. If IMAP is not already selected, tap the IMAP button.
9. Under the Incoming Mail Server sections, enter the following information:
   • Host Name—Enter the server name:
      
     imap.sitemasonmail.com
   • User Name—Enter your entire email address (e.g., myname@mydomain.com).
   • Password—Enter the password for your email account.
10. Under the Outgoing Mail Server sections, enter the following information:
    • Host Name—Enter the server name:
       
      smtp.sitemasonmail.com
    • User Name—Enter your entire email address (e.g., myname@mydomain.com).
    • Password—Enter the password for your email account.
       
      
11. Tap the Save button.
12. The iPhone will verify settings and return to the Mail, Contacts, Calendars screen.
13. Make sure "Use SSL" is set to off under Advanced