Posted on 07/01/2015 20:02:23
Yes, it is just an extra field in the signup form.
See the manual:
http://manual.dynamicweb-cms.com/Default.aspx?ID=6654
You use this form field in the create profile form:
<input name="<!--@UserManagement:User.EmailAllowed.InputName-->" type="checkbox" id="<!--@UserManagement:User.EmailAllowed.InputName-->" value="True" checked="checked" />
Attached some template samples