Open Mail Relays

Some articles on mail:

Emailable - Operation Overview
... a typical sequence of events that takes place when Alice composes a message using her mail user agent (MUA) ... the message in email format and uses the Submission Protocol (a profile of the Simple Mail Transfer Protocol (SMTP), see RFC 6409) to send the message to the local mail submission agent (MS ... The MSA resolves a domain name to determine the fully qualified domain name of the mail exchange server in the Domain Name System (DNS) ...

Famous quotes containing the words open and/or mail:

    Each man has his own vocation. The talent is the call. There is one direction in which all space is open to him. He has faculties silently inviting him thither to endless exertion. He is like a ship in the river; he runs against obstructions on every side but one; on that side all obstruction is taken away, and he sweeps serenely over a deepening channel into an infinite sea.
    Ralph Waldo Emerson (1803–1882)

    The mail from Tunis, probably,
    An easy Morning’s Ride—
    Emily Dickinson (1830–1886)