<[log in to unmask]>
  Last error was: 550 5.7.1 Unknown domain "mci2000.com" Cannot send to:
                  [log in to unmask]

Received lots of bounces including some auto-dels for [log in to unmask]

Checking the authoritative DNSes this a.m. makes it seem like the problem
has been resolved.

I did NOT pursue a related bounce:

<[log in to unmask]>
                Last error: 550 5.7.1 Unknown domain "internetmci.com" Cannot
                            send to:
/Pete