text: i know an email address but forgot the @ part. how do i find the email address if all i know is the begining?   hi.  your in quite a sticky situation :( you might not be able to find the service that the person you wish to email is using (the bit after @) as if they have a popular address then it would be likely that many people would have that prefix but with other services. you would be best trying to contact the person via another means of communication and asking them for the ending of their address.  hope i helped.  david.