The primary purpose of a transactional email is to convey information regarding the action that triggered it. But, due to their high open rates (51.3% compared to 36.6% for email newsletters), transactional emails are an opportunity to introduce or extend the email relationship with customers or subscribers; to anticipate and answer questions; or to cross-sell or up-sell products or services.[4]
Two other practical limitations can be seen in the case of digital marketing. One,digital marketing is useful for specific categories of products,meaning only consumer goods can be propagated through digital channels.Industrial goods and pharmaceutical products can not be marketed through digital channels. Secondly, digital marketing disseminates only the information to the prospects most of whom do not have the purchasing authority/power. And hence the reflection of digital marketing into real sales volume is skeptical.[citation needed]
In addition to linking to Letter Shoppe's designs (available on merchandise that is ultimately sold by Redbubble), the email campaign includes an endearing quote by the Featured Artist: "Never compromise on your values, and only do work you want to get more of." Redbubble's customers are likely to agree -- and open other emails in this campaign for more inspiring quotes.
Use it as a lead magnet/free mini-course. You can also use an autoresponder as a lead magnet to attract new subscribers to your email list. This is commonly done in the form of a free “mini-course”, or a free “challenge”, which promises to deliver a series of emails containing lessons (or other valuable information) over the course of several days or weeks. There is a high perceived value with a mini-course or a challenge like this, which makes it a very effective lead magnet.

