What is the optimal length for an email address in a database?

Question

Here is an extracted portion of my query, reflecting the EMAIL_ADDRESS column data type and property:

EMAIL_ADDRESS CHARACTER VARYING(20) NOT NU         


        

Answer 1

My work email address is more than 20 characters!

Read the appropriate RFC specification:

"The local-part of an e-mail address may be up to 64 characters long and the domain name may have a maximum of 255 characters"