Snail mail
/ˈsneɪl ˌmeɪl/
"Snail mail" in a Sentence (3 examples)
I came home to a mailbox stuffed with snail mail.
To send a letter by snail mail (the Postal Service), you must still compose it, and also print it out, unless you write it by hand or on a typewriter.
The official notice will be sent via both email and snail mail owing to legal requirements.