Update README.md

NaturalHistoryMuseum · Nov 19, 2015 · ef69f8b · ef69f8b
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@@ -10,6 +10,8 @@ This extension adds a contact form
      ckanext.contact.recipient_name =
      ckanext.contact.subject =
 
+If ckanext.contact.mail_to is not set, the form will fall back to using the CKAN setting "email_to".
+
 **Credits:**
 
 Borrows much of the contact form code from https://github.com/CityofSurrey/ckanext-surrey