Alphabet Confusion

Riddle: I start with the letter e, I end with the letter e. I contain only one letter, Yet I am not the letter e! What am I?

Answer: An envelope.

Source: https://www.riddles.com/4238

I start with the letter e, I end with the letter e. I contain only one letter, Yet I am not the letter e! What am I? — Alphabet confusion by saiadith v1.

Riddle: I start with the letter e, I end with the letter e. I contain only one letter, Yet I am not the letter e! What am I? Answer: An envelope. — by saiadith v2.