来自Big Physics
1970s: abbreviation of electronic mail.
wiktionary
The noun is an abbreviation of electronic mail. [1] The verb is derived from the noun, by analogy with mail(“to send through the mail”). [2]
Borrowed from Middle French email, from Old French esmal(“enamel”) (modern French émail(“enamel; vitreous enamel; glaze (coating on pottery)”)), [3] from Medieval Latin smaltum(“enamel”), ultimately from Proto-Indo-European *(s)meld-(“to melt; to soften”). Doublet of smalt, smalto, and schmaltz.
etymonline
email (n.)
type of pottery design pattern, 1853, from French email, earlier esmail (12c.), literally "enamel" (see enamel (n.)). Also now a variant of e-mail.