netmail vs e-mail

netmail is not a noun while e-mail is a noun.

Word	Noun	Adjective	Verb	Adverb
netmail	No	No	Yes	No
e-mail	Yes	No	Yes	No

As verbs, netmail and e-mail are synonyms defined as:

Other synonyms of netmail include email.

netmail (noun)	e-mail (noun)
	(computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that can be regenerated at the recipient's terminal when the recipient logs in

netmail (verb)	e-mail (verb)
communicate electronically on the computer	communicate electronically on the computer