$ telnet antispam.sxxxxxs.com smtp Trying 59.160.aaa.bbb... Connected to antispam.sxxxxxs.com (59.160.aaa.bbb). Escape character is '^]'. 554-antispam.kxxxxxs.com 554 Your access to this mail system has been rejected due to the sending MTA's poor \ reputation. If you believe that this failure is in error, please contact the intended \ recipient via alternate means. Connection closed by foreign host.
Poor reputation indeed! :-(