English to Russian Marketing Marketing / Market Research email marketing

What is an email drip campaign?
An email drip campaign is an email sequence with which you can send automated campaigns with a number of predefined follow-up emails that are sent a) during a certain period of time or b) depending on specific recipient actions to convert your target audience.

Интересует, какой из вариантов правильный: "капельная email-кампания", "капельна кампания" или "капельный маркетинг" в общем