What is Dead Letter?
1.
a dead letter is a letter that has never been delivered because the person to whom it was written cannot be found, and it also cannot be returned to the person who wrote it
if u send a letter and the person dont get it and u dont get it back
2.
A letter that has died.
E - "Did you hear that R has passed away?"
Jonny Woss - "Weawy? I didn't like him much anyway."
Hence the dead letter.
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