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French word pourriel comes from French pourri, French courriel ((Internet) email (system, message).)
pourri (French)
(of food etc.) bad, rotten; off. Bad; lame. Decomposed, putrefied (body). Rotten; decayed. Spoilt (child) (colloquial) swine, bastard. (slang) bent copper, dirty cop.
courriel (French)
(Internet) email (system, message).
pourriel (French)
Spam, junk mail.