Congratulations on your graduation! As a graduating student, you have several options available for continuing to take advantage of some of your ITS-provided computing services.
Your current ITS-provided computing services will continue as long as your department has you designated as "Active in Program." Alumni retain access to some, but not all, of those services. See What Happens to Your Uniqname, Directory Profile, and Computing Services After You Leave U-M for details.
Graduating students retain use of their Google Apps UMICH account, including Mail and Calendar, when they become alumni.
Students who prefer not to use Google Apps UMICH for their email can still retain use of their @umich.edu address when they become alumni.
U-M offers e-mail forwarding for all alumni for as long as you choose, at no charge. This reroutes messages sent to your @umich.edu address to a different e-mail account. Remember that when you change e-mail providers, you will need to change the e-mail forwarding address you've listed in the MCommunity Directory so that future messages will be forwarded to your new e-mail account.
For more information, see the Your Profile Settings (Mail Forwarding and More) section of the document, Managing Your Profile in the MCommunity Directory (s4380).