Accepting Invalid domain patterns.

[bsandy999]

Just wanted to add some observations.
Given package is working awesome, just apart from some basic things.

1. If we pass email id as domain its accepting and validating as valid domain name. Need to fix it. (e.g
   test@mail.com is email id and not domain )
2. If we pass consecutive dots in the domain name it's accepting and validating as a valid domain name. (e.g google..com, delivery...maxpain.com etc)

[gohumble]

Hey,

I brought in a PR. see #16.

Cheers