I want to be able to send an automatic message to a crew member when a record has been updated.

My Crew_Form has:

Crew_Name, Crew_Email, and Crew_Phone_Number

My report which they fill out they pick their name from a lookup of crew form, they then put the details in for the report and press send. When I update it I'd like them to get an email, what I'm unsure of is what I need to put in to the To:.

<CrewEmail>=<Crew.Crew_Email>;
sendmail
[
 from:zoho.adminuserid
 to:CrewEmail
 subject:"Subject of the email"
 message:"Your message"
]