MCI is No. 1 on a top-10 list of Internet service providers who either are friendly to or turn a blind eye to spammers using their systems, according to anti-spam Web site Spamhaus.org.
As of the middle of last week, MCI.com registered 242 known and unresolved sources of spam, far outpacing the No. 2 spam-friendly ISP, SBC.com, with 90, according to Spamhaus.org.
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