Abstract: Methods and systems for obtaining an email address. One method includes automatically compiling email address information and corresponding identifying information for a plurality of well-known entities from at least one data source; creating an address subsystem including an address database based on the email address information and the corresponding identifying information; providing a user interface, via an email application, the user interface including an address line and a message input mechanism for entering an email message; receiving addressee information from a user via the user interface, the addressee information not including an email address; generating a query based on the addressee information; sending the query to an address subsystem over at least one computer network; receiving at least one match from the address subsystem, the at least one match including an email address; and automatically entering the email address into the address line of the user interface.