Gmail says that because of the arduous process for senders to make their email super-trustworthy, the feature is currently limited to just eBay and PayPal. Gmail hopes to add more senders in the future, making the key icon a more widely used and recognizable symbol for verified accounts.

From time to time we run into marketers who think that they have deliverability covered because they have signed up with an Email Service Provider (ESP). You've probably even seen some ESPs that are promoting their very high delivery rates. This is confusing and misleading, because the ESP fully controls only one of the five major drivers of deliverability failures.

Short of going into the pharmaceutical business, I think some of the characteristics spam emails can be of use to mainstream business owners.

Fred Tabsharani of Port25 Solutions wrote a paper that should help give readers a clearer understanding behind email authentication and its potential value.

Because welcome messages have an extremely high open rate, you’ll likely see more response to this email than a standard campaign. So take advantage of this interest and try to convert immediately.

very interesting insights into how the catalog business deals with list rentals... I'm assuming they are not talking about email list rental though...

David Daniels issues another email marketing research report. Price tag: 749$