Okay, I've gotten what I believe are all of my problems worked out on the
OS upgrade for firebird (the Phoenyx box).  

Sunday, June 18, the Phoenyx will be down for approximately two hours
between 1 and 4 PM.  I will be swapping in a new harddrive and then
upgrading the operating system and many support programs.  This will give
us a faster hard drive, more current software, and get us out of the dark
ages of Debian Linux.  

Incoming mail will be held at the sending site for (normally) up to four
hours without generating any warnings or errors.  Even after that, it
usually takes days before a sending site will discard mail as
undeliverable to a machine that is down.

We will attempt to set up a temporary web server to indicate that we are
down for maintenance, but that might not happen.  (We need to get a
machine with a 10Base-T network adapter to connect it to the DSL device.) 

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