I assume you are asking if you can receive mail from more than one account on the iPhone. If so, the answer is yes. I currently check two POP3 accounts from my ISP and two Gmail accounts (IMAP). Just add another account in Setup.
Settings; Mail, Contacts, Calendars; Add Account...; If its Gmail then select other and follow the instructions from here From there it should be self explanatory.
Good Luck
I run 3 email accounts. Remember you can only run one exchange account on the iPhone so make sure its the most important. Set the other exchange accounts up through Outlook and it will work the same.
Settings; Mail, Contacts, Calendars; Add Account...; If its Gmail then select other and follow the instructions from here From there it should be self explanatory.
Good Luck
I run 3 email accounts. Remember you can only run one exchange account on the iPhone so make sure its the most important. Set the other exchange accounts up through Outlook and it will work the same.