Question

What characters are allowed in an email address?

Answer 1

we write email in small characters...... because it was compulsory to write the email in small character it was just like a rule of writing a proper email

Answer 2

Answer:

should say: In addition to restrictions on syntax, there is a length limit on email addresses. That limit is a maximum of 64 characters (octets) in the "local part" (before the "@") and a maximum of 255 characters (octets) in the domain part (after the "@") for a total length of 320 characters.