views entity reference to point email instead of uid in contextual filter? I'm using Drupal 7 and Views. I've been trying to sort out, entity reference to enable a contextual filter to sort by email, instead of UID as currently I am doing. 

Is that possible?
Yes. If you're look to contextually filter a view based on an Entity reference's (user) email, you can add a Relationship with the value of Entity Reference: User. This allows your view rows to be join with the rows in the entity that is referenced.

With the relationship added, you can add a new User: E-mail contextual filter for the view.