% host -t mx aval.ua
aval.ua MX 5 smtp2.aval.ua
aval.ua MX 10 smtp.aval.ua
aval.ua MX 20 smtp1.aval.ua
% telnet smtp2.aval.ua 25
Trying 194.44.50.2...
Connected to smtp2.aval.ua.
Escape character is '^]'.
421 The evaluation license has expired.
Connection closed by foreign host.
aval.ua MX 5 smtp2.aval.ua
aval.ua MX 10 smtp.aval.ua
aval.ua MX 20 smtp1.aval.ua
% telnet smtp2.aval.ua 25
Trying 194.44.50.2...
Connected to smtp2.aval.ua.
Escape character is '^]'.
421 The evaluation license has expired.
Connection closed by foreign host.