E-card is an electronic postcard or greeting card, with the primary difference being that it is created using digital media instead of paper or other traditional materials.
[1] Since e-cards are digital "content", they are highly editable, allowing them to be extensively personalized by the sender.
One technical aspect that remained mostly constant until 2019 was the delivery mechanism: the e-mail received by the recipient contains not the E-card itself, but an individually coded link back to the publisher's website that displays the sender's card.
The greeting card metaphor was employed early in the life of the World Wide Web.
[7] In 2001, Hallmark artists Bob Holt and Mike Adair developed early incarnations of Hoops and Yoyo, which became one of the first recurring e-card characters.