I own a list here, don't usually fuss with things too much, but suddenly
I'm being monitored, and I don't know why.

Anybody make any sense out of this:

 Last error: Unavailable; DSN status was 5.1.1

Now, I know that my ISP was bought out by a bigger fish, and they have
changed some hardware, but I don't know what specifically has occurred.  I
would hate to be dumped from my own list, and I especially would hate not
to be able to manage the list if somehow the ISP numbers were changed, etc,
etc.

If anybody has any suggestions, I'd appreciate hearing them.

Thanks,
Philip Brownell
owner, Gstalt-L