The trend is underway for email to get smart. Gmail can leverage JSON-LD and schema.org  to markup information in emails to support interactions with recipients: an RSVP Action for events, a Review Action for restaurants, movies, products and services; a One-click Action for anything that can be performed with a single click; a Go-to Action for more complex interactions to be completed at a web site, as well as Flight interactive cards to confirm reservations and and trigger a Google Now boarding pass. (See our story here about the addition of JSON-LD markup in Gmail.)

Late last week, the search giant also announced that users in its Google Search field trial now can look up Gmail contacts directly from Search. (Those in the field trial can type or speak in queries to retrieve answers in Search from Google Drive or Calendar as well.) With the Gmail integration enabled, Google says users now can do things like get quick directions to a friend’s house or one-tap access to call a contact just by asking for the person’s address or querying for the phone number.

Not to be left out of the intelligent email picture, Yandex late last week debuted Marker.

The new capability leverages MatrixNet, its machine-learning technology whose algorithms are defined by more complex ranking factors, and the fact-extraction technology it employs in its search capabilities to perform citation searches and automatically aggregate news for users. Together, these help to determine the type of correspondence a user has received and then to offer up the right tools for working with it.

With this in place, Yandex.Mail now can identify 15 different types of email, from the personal to goods and service discount mailouts, the company says. And it can help users take actions around a few of them, including electronic air tickets, invitations to meetings, and messages about discounts, by providing reminders about an upcoming dinner invite or online flight (with online checkin capabilities, as well), for instance. It expects to recognize and organize more types of correspondence in the near future.