How to send email by simple email address using crm

I'm working with crm dynamics 2016, I want to send an Email from crm using an email address that the user insert (the mail is taken from a field in incident-Entity and not from crm-user) according to examples online the option is to use entityreference from another entity that will hold and get the Email address, is there a way not to use Entityreference but instead get my mail address from a simple field on incident form?