B t sign in e mail

You're referring to the "bt" symbol in an email address!

The "bt" symbol is often used to represent the "at" symbol (@) in email addresses, especially when typing on a keyboard that doesn't have the @ symbol. This is because the "bt" combination is often used as a substitute for the @ symbol in text-based communication.

For example, if someone's email address is "[email protected]", they might type it as "john.doebtexample.com" in an email client or when sending an email.

However, it's worth noting that using "bt" instead of the actual @ symbol can sometimes cause issues with email delivery or formatting. It's generally recommended to use the actual @ symbol whenever possible to ensure that your email address is correctly formatted and delivered.