1. It is 21 characters long 2. Nope! I would be surprised to see that nowadays. 3. For sending mail, yes absolutely. Receiving mail is a different story thoug

1. It is 21 characters long 2. Nope! I would be surprised to see that nowadays. 3. For sending mail, yes absolutely. Receiving mail is a different story though, it seems like most systems do not care.