Someone who fails hard, and often on the internets. Often a failure in real life, also.
Spark is very much an e-failure as he often tries to create pitiful jokes and gets pwned by noobs on XBL and on IRC.
when you type someone’s name wrong in an email but the government knows who you were trying to contact and contacts them through esp anyways.
The e-mail failure had someone thinking about the sender during the day.