Validating email addresses with >3 subdomain levels fail

[bcroby]

When validating email addresses, there is an if statement (around line 1407) which checks to see if there are more than 3 subdomain levels. I recently ran into an issue with a US public school email address which had 4 levels to their subdomain (ex: username@mail.school.k12.il.us).

Here's the if statement that was tripping it up:
if (domain.split('.').length > 3 || domain.split('..').length > 1)

After tweaking the threshold to be 4 (instead of 3), it resolved the problem. I don't know if this is necessarily a "bug", but wanted to bring it up in case other people experience this issue as well.

[victorjonsson]

The logic should actually be removed.