If the email address that you have entered seems to be correct, but it is being rejected when you try to submit your online membership form, this might be due to one or more blank spaces appearing at the end of it.
Extra spaces are sometimes added if you copy and paste your email address from another application, or if you use your web browser's autofill function to complete online forms.
Try deleting any extra spaces, and resubmit the membership form - your email address should now be accepted.
If you try this, but your email is still rejected, please contact: Tech.Support@healthcarelibrary.qub.ac.uk