Hi, we get this error when sending out newsletters any help?

1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '[email protected]'' at line 1
in:
[SELECT count(*) as count FROM subscribers WHERE email_address = '[email protected]'[email protected]']
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.

Thanks