Only domain size is checked

[jcbf]

There is a check in the address size and that only check the domain part. When localpart is bigger the allowed 64 octets, it should return a reject message.

References :

• rfc5321 section 4.5.3.1.1

4.5.3.1.1.

Local-part

The maximum total length of a user name or other local-part is 64 octets.

[jcbf]

Fixed in #51