I am trying to enable email authentication with Constant Contact.
My email/domain address ends in .org and not .com. Does that matter since it is ".ccsend.com"
That's a great question! The good news is your email address ending in .org doesn't matter when setting up your email authentication. The .org at the end of your email address is replaced with .ccsend. Here's an article from our Help Center with more information on this process.