Both servers are geographically separated machines where the sender is a server located in The Netherlands and the receiver is a server located in the United States.
(Often, that the sender is very old).
The subject line is "Peter" and the sender is "Nancy".
Most often, the sender is gloating about something or other.
The recipient will decrypt the header and verify who the sender is.
Recipients of the Qmail messages routinely assume the sender is a sentient being, Mr. Nelson said.
Each time a screenshot of a Snapchat is taken, the sender is alerted that the image has been captured.
"If the sender is your long-lost brother," he said, the payment can be declined, costing the sender nothing.
Even if the sender is caught, Mr. Rullo said, the incident at the camp will still haunt this town.
If the person viewing the picture tries to use an iPhone feature that captures an image of whatever is on the screen, the sender is notified.
Alas, it's not always so simple, especially when the sender is someone you know, or vaguely know, who might take great offense at your extrication.
