People often forget that email messages last forever and can be forwarded to any number of people.
There are services, though, that allow you to send a message with a limited lifespan, which come in handy when you have sensitive messages that you don’t want shared.
The best services are OneShar.es, Burn Note, Privnote, Destructing Message and This Message Will Self Destruct, says technology writer Mike Elgan, Computerworld.
When you use these services, you type your message on their website and they send an email to the designated recipient—not with the message itself, but with a link going back to the message on the website. Some services delete the message after it’s been read once, others allow you to set an expiration date.
— Adapted from “Why smart people do dumb things online,” Mike Elgan, Computerworld.