One contact, two or more emails?

My Mautic version is: 2.15.3
My PHP version is: 7.0.18

My problem is:

Hey guys, good morning!
I apologize for my before-hand English!

I wanted to check the following…

I happen to have some contacts who have more than one email. Mautic has the possibility to generate custom fields to add new data with their respective data type.

The question is How do I choose whether to send emails to Mail 1 or Mail 2?
Is it possible? Did someone do it or do you know how to do it?

The email address is really the unique identifier of a lead. Its a 1:1 relationship.
Or to phrase it differently: for Mautic each email is a different user.