E-mail direct marketing

Personally, I think EDM is not very popular now. If it is used to maintain customer relations, it is ok, but general active marketing will be considered as spam. You can also conduct marketing through interaction.

The following is Baidu Encyclopedia:

E-Email Direct Marketing (EDM for short) is an online marketing method that delivers value information to target users through e-mail on the premise of users' prior permission. E-mail marketing has three basic elements: user permission, e-mail delivering information, and information being valuable to users. None of these three factors can be called effective e-mail marketing. E-mail marketing is a direct selling method that uses e-mail to communicate with audience customers. At the same time, it is also widely used in the field of network marketing. E-mail marketing is one of the oldest online marketing methods. It can be said that email marketing is older than most website promotion and online marketing methods.