ok, thanks for the help. But it still isn't working. I'm thinking it's not compatible with 1.3.7? I remember some changes we're made to the e-mailing system in the new zen cart. If you login as a user and ask a question it is fine. Maybe it's using the e-mail settings of a logged in user. But as a guest it's the same, I don't understand your e-mail address error on every address I try. You can see what I mean, it's the site in my signature.