Do capital letters matter in email addresses

In email addresses, capital letters do matter, but only in certain situations. Here's what you need to know:

1. Case sensitivity: Email addresses are case-sensitive, which means that the capitalization of letters can affect whether an email address is valid or not. For example:
   • [email protected] is a valid email address.
   • [email protected] is also a valid email address, but it's considered a different email address from the first one.
2. Local part: The local part of an email address (the part before the @ symbol) is case-sensitive. This means that if you use a capital letter in the local part, it will be treated as a different email address from one that uses a lowercase letter.
3. Domain: The domain part of an email address (the part after the @ symbol) is not case-sensitive. This means that you can use uppercase or lowercase letters in the domain, and it will still be considered valid.
4. Email clients and servers: Most email clients and servers are designed to be case-insensitive when it comes to email addresses. This means that if you enter an email address with a capital letter, it will be converted to lowercase before being sent to the server.
5. Best practice: To avoid any potential issues, it's generally recommended to use all lowercase letters in email addresses. This is because it's easier to remember and type, and it reduces the risk of typos or capitalization errors.

In summary, while capital letters do matter in email addresses, the impact is limited to the local part of the address. To be safe, it's best to use all lowercase letters in your email addresses.