Before you lookup an email address, you may want to get a better understanding of how email addresses are created.
Email addresses have two three distinct pieces:
The email address name. This differentiates multiple email addresses from the same domain (BobSmith)
The "at" symbol which separates the other two parts (@)
The domain name of the email provider (example.com),
In a properly formatted email address all three pieces should be combined with no white space separating the various parts. For example BobSmith@example.com not BobSmith @ example.com.