Insufficient responses for TCP sequencing (3), OS detection may be less accurate
Interesting ports on sd3.mailbank.com (208.49.167.83):
(The 1540 ports scanned but not shown below are in state: closed)
Port       State       Service
21/tcp     open        ftp                     
80/tcp     open        http                    

No exact OS matches for host (If you know what OS is running on it, see http://www.insecure.org/cgi-bin/nmap-submit.cgi).
TCP/IP fingerprint:
SInfo(V=2.54BETA22%P=i386-unknown-freebsd4.0%D=6/1%Time=3B175C67%O=21%C=1)
TSeq(Class=RI%gcd=1%SI=432624%TS=100HZ)
T1(Resp=Y%DF=Y%W=7F53%ACK=S++%Flags=AS%Ops=MENNTNW)
TSeq(Class=RI%gcd=1%SI=43288E%TS=100HZ)
T1(Resp=Y%DF=Y%W=7F53%ACK=S++%Flags=AS%Ops=MENNTNW)
T2(Resp=Y%DF=N%W=0%ACK=S%Flags=AR%Ops=)
T1(Resp=Y%DF=Y%W=7F53%ACK=S++%Flags=AS%Ops=MENNTNW)
T2(Resp=Y%DF=N%W=0%ACK=S%Flags=AR%Ops=)
T3(Resp=Y%DF=Y%W=7F53%ACK=S++%Flags=AS%Ops=MENNTNW)
T2(Resp=Y%DF=N%W=0%ACK=S%Flags=AR%Ops=)
T3(Resp=Y%DF=Y%W=7F53%ACK=S++%Flags=AS%Ops=MENNTNW)
T4(Resp=Y%DF=N%W=0%ACK=O%Flags=R%Ops=)
T3(Resp=N)
T4(Resp=Y%DF=N%W=0%ACK=O%Flags=R%Ops=)
T5(Resp=Y%DF=N%W=0%ACK=S++%Flags=AR%Ops=)
T4(Resp=Y%DF=N%W=0%ACK=O%Flags=R%Ops=)
T5(Resp=Y%DF=N%W=0%ACK=S++%Flags=AR%Ops=)
T6(Resp=Y%DF=N%W=0%ACK=O%Flags=R%Ops=)
T5(Resp=Y%DF=N%W=0%ACK=S++%Flags=AR%Ops=)
T6(Resp=Y%DF=N%W=0%ACK=O%Fla
Uptime 24.552 days (since Mon May  7 15:57:17 2001)

# Nmap run completed at Fri Jun  1 05:12:07 2001 -- 1 IP address (1 host up) scanned in 24 seconds