"from" address

When a recipient receves an e-mail from me my address is always in the form of FirstName_LastName/”domino domain Name”@domain, Now I have checked on my local machine and the location document contains my proper e-mail address which is firstname.lastname@domain, I have also checked my personal document on the domino server and it contains my proper e-mail address as well. I have also checked the domain document under the messaging configuration and it has the right conversion. Anything else I can check?