4 ms·What’s wrong with e-mail?by mandelbrotwurst 5y agoWhat’s wrong with e-mail?charcircuit 5y agoSome people don't check their email so a physical letter can be used as a backup.short12 5y agoSome people don't check their mail eitherjobigoud 5y agoBut you can send a letter with proof of reception so at least they know if you received it or not.