Another name for mail delivered by regular postal system

You're looking for an alternative term for mail delivered by the regular postal system!

Here are a few options:

1. Snail mail: This is a common informal term used to describe traditional mail sent through the postal system, as opposed to electronic mail (email).
2. Regular mail: This term is straightforward and simply refers to mail delivered by the regular postal service.
3. First-class mail: This term specifically refers to mail that is sent through the postal system and is considered to be of high priority.
4. Letter mail: This term is often used to describe mail that is sent through the postal system, particularly letters and postcards.
5. Surface mail: This term is sometimes used to describe mail that is sent through the postal system, particularly when it's not sent by air or express mail.

I hope these options help!