sendmailのバージョン確認

$telnet 127.0.0.1 25
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
220 localhost.localdomain ESMTP Sendmail 8.13.1/8.13.1; Tue, 22 Jun 2010 04:47:03 +0900
quit
221 2.0.0 localhost.localdomain closing connection
Connection closed by foreign host.

↑バージョンは8.13.1でした。