Can orders placed through the backend via non-web channel be attributed?
Yes, the order will be attributed to MageMail if there is an open, click, or coupon associated with the email address used to create the order. MageMail's email marketing services pricing is based on driving more sales and keeping your brand top-of-mind.
Here's an example. Let's say a customer gets an email and clicks through. However, s/he runs into questions prompting them to call - or come into the store - to have the order placed. Because they clicked through from the email, that order will be attributed even though it's placed through the backend.