In a previous article, "Jay Honeck" said:
When it became obvious that it was NOT "everyone else's" problem, I
contacted Mediacom to inquire about the service. Here is their reply --
anyone care to translate? (What the heck is MAPS and RBL, and why is
MEDIACOM the one that is "blacklisted"?):

MAPS and RBL are "Mail Abuse Prevention System" and "Realtime Blackhole
List" respecitively. They are both systems that some ISPs use to refuse
email from sites that host spammers. Unfortunately, both sites (and every
other spam blackhole list that I've encountered) are run by megalomaniacs
who think that they are the only true spam solution. Because of this,
they are quick to list whole IP (internet address) ranges as spam sites on
very flimsy evidence, and are very slow to remove those lists if they made
a mistake (which they will never admit was a mistake). Think of them as
the Donald Rumsfelds of spam prevention.

These two lists listed a whole IP range that includes your Mediacom mail
server, probably based on one or two spam reports for spam coming from
other customers of whoever Mediacom got their IP address range from.
Eventually they will unlist the Mediacom range, but they will spin it like
they are making great progress in the war on spam and they are doing you a
great favour.

--
Paul Tomblin http://xcski.com/blogs/pt/
UNIX was half a billion (500000000) seconds old on
Tue Nov 5 00:53:20 1985 GMT (measuring since the time(2) epoch).
-- Andy Tannenbaum