Authentication provides email senders and receivers some additional ways of differentiating legitimate email from spam, phishing and other forms of fraudulent email that threaten the safety of consumer and damage the reputation of the brands whose domain names are abused.

But wait, there's more!

Undertaking the sometimes daunting task of deploying authentication also provides a great excuse for IT managers to begin tackling the unruly and sprawling beast that is today's modern corporate email infrastructure.

One of the benefits of deploying authentication is that it necessarily requires you to survey – and perhaps rein in – all of the ways the organization uses email. Thus this process provides IT managers with an excellent opportunity to bring some order, or at least some understanding, to what can sometimes be a chaotic mess.