Actually, you don't need a repeating field for this - just make your calculation fied =
List ( Email1 ; Email2 ; Email3 )
and set the result type to Text.
Note that having "numbered" fields of the same type is bad practice; you should use a separate table of e-mails where a customer may have any number of related records.
Thank you. I was not aware the relationships would validate true from list of values. I've been using FM since version 2 (Claris) I've learned something new. (I guess I should finally consider taking a certification course) Not sure how I missed that but thank you. This makes my use of repeating fields even less relevant now.
I appreciate the comment regarding normalizing the email data by storing them in related fields instead. We're not there yet. The system is a converted Goldmine 6.5 SQL database.. I'm working on it.
Thanks again for your assistance.