Entering Invalid emails is going to a sorry page

[KrupaPammi]

We need to implemented additional validation on email field in marketing preferences section.

Below example emails are going to a sorry page.

On email field, when I enter an email like the below ones, there's no error message displayed
[email protected]@comicrelief.com - having two @ should allow only one @ character
[email protected]@comicrelief.com - having two .com
[email protected] [email protected] - giving space in between and entering the same email again
test\[email protected] - back slashes in local-part of email
[email protected] - more than two domain names are allowed, not sure how many can we allow like org co uk com net etc?