We soft launched our new one-click email authentication feature in MailChimp a couple weeks ago. It’s basically a way you can authenticate your email campaigns to pass DKIM, DomainKeys, SenderID, and SPF.
Previously, authentication required some server setup (and you were lucky if your ISP even allowed you to do it). Now, it’s just a checkbox you click when you create a campaign. One click, and you’re authenticated.
If you’re a designer sending campaigns on behalf of clients, you’ll be happy to learn that authentication is done on a per-campaign basis—not account-wide (because you may have some clients who prefer not to authenticate their campaigns).
Is authentication worth it?
For those of you who don’t know, email authentication is a way to make your emails look slightly more trustworthy, and theoretically help with your deliverability. We haven’t seen huge improvements to big ISPs like Yahoo, AOL, etc. But we have seen emails suddenly pass through corporate firewalls that we’ve previously been unable to deliver through. So if you send to lots of corporate recipients, it’s something you might want to look into.