Emotional sales proposition, emotional triggers used in marketing messages to convince a person to make a purchase.
ESP (Email Service Provider) is a company that provides marketing services through email and/or mass mailing. They may also offer other services such as email tracking, email segmentation, testing, template creation, subscriber lists, etc.
Mailchimp, ActiveCampaign, and Aweber are examples of ESP.
Meanings of ESP
(Focus) Usually more than usual.