Related:

• leaf site n.,obs. Before pervasive TCP/IP, this term was used of a machine that merely originated and read Usenet news or mail, and did not relay any third-party traffic.
  It was often uttered in a critical tone; when the ratio of leaf sites to backbone, rib, and other relay sites got too high, the network tended to develop bottlenecks....
• leaf site: n. A machine that merely originates and reads USENET news or mail, and does not relay any third-party traffic.
  Often uttered in a critical tone; when the ratio of leaf sites to backbone, rib, and other relay sites gets too high, the network tends to develop bottlenecks....
• Mail server hit by UniSpammer.
• pamhaus spam'hows n. Pejorative term for an internet service provider that permits or even encourages spam mailings from its systems.
  The plural is `spamhausen'. There is a web page devoted to tracking spamhausen....
• The co-locator cannot verify the frame-relay gateway to the ISDN server.
• What me worry? I read relay mail.
• Computer: "Leela, you've got mail. It's not spam!
• backbone site: n. A key USENET and email site; one that processes a large amount of third-party traffic
  especially if it is the home site of any of the regional coordinators for the USENET maps....
• bounce message: [UNIX] n. Notification message returned to sender by a site unable to relay {email} to the intended {{Internet address}} recipient or the next link in a {bang path} (see {bounce}
  ense 1). Reasons might include a nonexistent or misspelled username or a {down} relay site....