Welcome to our Community and thanks so much for your first post - it's easily done; I do it all the time as some of my emails end in .com and some are .co.uk!
As @Graham_A advises, if it is an incorrect address it will just be bounced back as non-deliverable.
However, we do want to ensure we have the correct details for you - was this for your mobile or cable account? Was this for a contact email we have for you or for your ebilling? Let us know and we'll either be able to advise how to update/change it or we can do that for you.