You still have access to your Queen's email address for as long as you need it!  Email accounts remain active for two years after graduation, after which time, if they are found not to have been used for over 6 months, they will be considered inactive and will be deleted. 

Full terms and conditions can be found here.

If you have any issues, contact the Alumni Engagement team on alumni@qub.ac.uk and include the following information so we can verify your account before raising the issue with IT on your behalf:  Your full name, date of birth, the subject you studied at Queen’s, and your year of graduation.