Capital letter in mail

You're referring to the capitalization of letters in email addresses!

In email addresses, the rules for capitalization are a bit different from those in regular writing. Here are some guidelines:

1. Domain names: The domain name (the part after the @ symbol) is usually written in lowercase letters, but it's not uncommon to see it in mixed case (a combination of uppercase and lowercase letters).
2. Local part: The local part (the part before the @ symbol) can be written in any case, but it's generally recommended to use lowercase letters to avoid confusion.
3. Special characters: You can use special characters like underscores (_), hyphens (-), and dots (.) in your email address, but it's best to avoid using them in the local part to make your address easier to read.

Here are some examples of valid email addresses:

• [email protected] (lowercase domain name)
• [email protected] (mixed case domain name)
• [email protected] (uppercase domain name)
• [email protected] (mixed case local part and domain name)

Remember, the most important thing is to make sure your email address is unique and easy to remember!