Turn off email validation during registration

Hi Guys,

I am getting an 'email not valid' error even when my email is valid on mini registration page(please see the attachment). The registration does work even with the error, so the error shouldn't be there. It does go away after a minute or so if you wait, but I suspect my users aren't going to like seeing that especially when they've entered a valid email.

Is there a way to fix this or turn off email validation in Back-end or in the source code? If so, how would I go about doing that?

Thanks so much,

Suman