Strange problem. Laptop vs BB

I have one user that if he sends an invitation for a meeting out to a customer from his Blackberry, which we have a Blackberry server in-house, the return address is correct. If he sends an invitation from his laptop it puts an extra dot and domain name before the @ sign.

His location document has his correct email address. His person document has his correct internet email address.

I noticed in the Global Domain document that there is a place to add the dot and domain if all else fails.

In his list of alias’ in his person document he does not have the notes address first but an internet address. IE. Instead of Bob Smith/ABC the firs address is “Bob Smith” bob_smith@abc.com. Could this be causing a problem?

Any ideas would be greatly appreciated.