I'll send you an e-mail.

send Verb

— To send something is to make the thing go somewhere without the person. A person sends a letter by putting it in a mailbox. A person can send another person somewhere by telling the person to go there. She needed to send a letter to her mother to say she had arrived safely. Could you send Roger into see me please?

you Pronoun

— Used instead of the name of the person being spoken to; it is a second-person pronoun. You are my best friend. Can I go to the shops with you? — Used to talk about anyone. You have to be 18 years old to see that film. She has problems with her eyes, and can't see you properly.

you Determinative

— Used before a word that means the person or people someone is talking to. You guys can leave now.

an Determinative

— An (or a) is used when the following word could be any of a certain type. I just ate an apple. It is indeed an honor to have met you today.

e Noun

— E is the fifth letter of the alphabet, and is the most common vowel and letter used in the English language. "d" comes before "e" — The constant e is a real number that has formula math \mathrm{e}=\lim_{n \to \infty}\left(1+\frac{1}{n}\right)^{n}/math, and is approximately 2.718281828.

mail Noun

— Mail is the messages and packages that you send to other people. There's no mail today because the post office is closed. The new book arrived in the mail.

mail Verb

— If you mail something, you send it through the post. I mailed a birthday card to him last week.