Each incoming message has a code that identifies the sender, so Mr. Whiteside has programmed his computer to sort through the missives like Robo-Mailman.
"Return to sender, address unknown" will be a phrase coming from Elvis Presley's Graceland mansion, but it won't be set to music.
The address, however, had been crossed out and "return to sender" stamped on the envelope.
In addition, the sender should pay all the fees, including those of the correspondent bank; A right of redress through a national banking regulator if there are problems; Improvement of cross-border links between national domestic clearing systems.
An envelope from an anonymous sender arrived last week with a $100 bill tucked inside.
The practice is called "bypass" mail because the shipment moves directly from sender to airline to addressee, bypassing post offices.
The script was sent her by mail, but the sender did not give his or her name, or a return address, she said.
If not, the sender would re-send the data. X-MODEM was simple but it was relatively slow for large files.
This means that costs are charged not to the sender but also the beneficiary.
Customs documents named a Lebanese as the sender.
To send a message, the file is encrypted with the sender's private key and the recipient's public key.