TRANSMITTING VALID COUPON OFFERS TO AN EMAIL RECIPIENT

An email server sends an email message to a user with an empty container. When the user uses an email client to open the email message, the email client transmits pulls data to be loaded into the empty container from a dynamic content provider. The dynamic content provider determines in real time a set of valid coupon offers for the user and transmits the set to the user in real-time for insertion into the empty container. The dynamic content provider may determine a rank for each of the set of the valid coupon offers, such that the rank is observed when the set of the coupon offers is inserted into the empty container.