What is Value versus Waste?
Let’s take an example: when I make an email for an another department, what is Value adding and what is Waste during this activity, same for the people who will receive the email and read it?
3 reasons to do something:
It makes the primary process (your conversion, say 'the line'or 'the machine') run more efficient or more effective
I see no way how an email makes this happen… Don’t try to find reasons. What did you REALLY wanted to achieve with this mail? What is the REAL value (if there is any)?
When it does not influence the line, does it then thrills your customers? Does it make him really happy? (So not first make him unhappy and now try to control the damage. So does he care about this email?
Now, if the customer does not care and the line is not running better, there can only be one more reason to do it: It is a legal obligation (no, not some company rule but really LEGAL and please take law-book with it to check what it says).
Since in my country there are no legal obligations as far as I now to send emails… draw your conclusion!