Date   : Tue, 21 May 1985 13:59:36-MDT
From   : "William G. Martin" <WMartin@SIMTEL20.ARPA>
Subject: Re: Usenet Mail Addresses

I've found that the best path from ARPA-land to USENET is to always
use host "seismo". If "seismo" is one of the choices given in a {} selection,
like {decvax,seismo,aplvax}!crash!bang!thud or the like, then use seismo,
and append "@seismo" on the end of the string. To send to the above fake
address, you'd send to "seismo!crash!bang!thud@seismo.ARPA" (your own mailer
will probably put that ".ARPA" on the end automatically).

If all you have is a string of exclamation-point addresses, like

zap!oof!bletch!crud

then again surround them with "seismo"s, like:

seismo!zap!oof!bletch!crud@seismo

in your "To:" field. This seems to work just about all the time...

Pragmatically, Will Martin