Go to the Settings page.
Settings page is defaulted to General tab.
Find Contact Lookup at the bottom of page.
Click on the Contact Lookup drop-down list, click on the type of lookup you want, then click Save.
Format Only checks the format of the input and ensures it is a valid format.
Validity Check ensures the entered phone number or email are valid contacts.
Enhanced Data does a Validity Check and also returns information about the contact owner.
(for the purposes of this article, we will select Validity Check)
Go to the Clients page (step1) and select a client (step2).
Once on the selected client's page, fill in the Texts form and click Save.
If it is a valid phone number, it will return a validated contact and default it to be Auto-Notifiable.
If it is an invalid phone number, it will return a invalid contact.
On the selected client's page, fill in the Mails form and click Save.
If the entered email address is a valid one, it will return a valid validated contact and default it to be Auto-Notifiable.
If the email address is invalid, it will return an invalid contact.