past tense of mail; to send something through the postal system.
From Old French 'male' (a bag or pouch), derived from Germanic languages. The modern sense of 'mail' developed when postal systems used bags to transport letters.
Your email is literally 'electronic mail'—the word 'mail' comes from medieval mail bags, so when you hit send, you're participating in a 500-year-old metaphor about carrying messages in containers from place to place.
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