High Quality Content by WIKIPEDIA articles! Hybrid mail is mail that is delivered using a combination of electronic and physical delivery. Usually, it involves digital data being transformed into physical letter items at distributed print centres located as close as possible to the final delivery addresses. An email letter (also L-mail and letter mail is a letter which sent as an email using a computer then printed out and delivered as a traditional (physical) letter. It is a communication means between the virtual cyber- and the material real world.