To write an email, you will need the following:

To write an email, you will need the following:

1. The recipient's email address
2. The subject of the email
3. The body of the email, which includes the message you want to convey

Here is a basic structure for an email:

1. Start with a greeting, such as "Hello" or "Hi."
2. Introduce yourself and your reason for writing.
3. Provide the necessary information or ask any questions you have.
4. End with a closing, such as "Thank you" or "Best regards," and your signature.
5. Make sure to check the spelling and grammar before sending.

You can also add some other elements to your email like cc, bcc, attachment, etc.