Hello @CBSI ,
At this time when searching for email addresses, you'd need to use the full email address from the beginning, since there isn't a contains aspect when it comes to emails.
With that said, the redesign is still in beta, so our devs are looking at what things still need to be tweaked, updated, or added. I've tracked the relevant feature request and submitted it to their queue. If and when there's an update regarding this, they'll notify you by email.