I get it, some people need to consider email as an option. The expense of postage can be overwhelming, especially if it is international postage. If this is you, you do not have to terminate the correspondence. You can choose to write me at email@example.com. By writing to my email address, replies are done within hours, and not days (domestic) or weeks (international). In regards to me, I try to keep up with all of my postal correspondences as I am sure most prefer postal mail. Still if the time comes when you need to rely on email, you can choose to write me. Also, all of my letterheads has my email address.