Publishers offering "Sponsored Email" spots

A sponsored email is a message sent to a publisher's subscribers on an advertiser's behalf, often as an alert or a branded note. Fantasypros, Freecads and PADI Worldwide sell versions of it.

How it's sold: Booked directly with the publisher's sales team. Fourteen publishers list it, all by email.
Typical price: On request, usually a flat fee per send.
What you supply: Subject line, copy, images and a link, and some publishers help write it.
Best for: A loyal subscriber list that receives an offer or a story.
Before you buy: Request the list size and the open rate, and check how the email will be marked as sponsored.