From: Wine.com
Subject: Our Gift to You

You made someone's day with a gift. Now let us make yours.

This triggered email from Wine.com was a well-timed example of recency based email marketing. I received this offer a few hours after sending a gift to a friend. Wine.com knows that the likelihood of someone coming back to make a second purchase goes down with every second that passes after their first purchase. I also enjoyed how they created urgency around using the offer by dynamically injecting an order expiration date into the fine print.