Bug: Fix Validation for Email Address

[steveburtch]

Current email address component is complete according to its ticket.
Subsequent findings by QA are to be added to this ticket and resolved.

valid email format by ISO that is currently not accepted right now:

• "very.(),:;<>[]".VERY."very@\ "very".unusual"@strange.example.com

invalid email format that is accepted:

• i.like.underscores@but_they_are_not_allowed_in_this_part

[mstanton1]

To tackle as part of overall validation for the BTR filing. Email validations should match what is allowed in other Registries locations (account set up, filings).