Cant generate jssecacerts by gencert.bat. java.net.ConnectException: Connection refused: connect

Cant generate jssecacerts by gencert.bat. java.net.ConnectException: Connection refused: connect

Hi!
I cant generate  jssecacerts. What the problem?
C:\ManageEngine\ServiceDesk>gencert.bat mail.intech.com:995

C:\ManageEngine\ServiceDesk>jre\bin\java -cp lib\cert.jar InstallCert mail.intech.com:995
Loading KeyStore C:\ManageEngine\ServiceDesk\jre\lib\security\jssecacerts...
Opening connection to mail.intech.com:995...
Exception in thread "main" java.net.ConnectException: Connection refused: connect
        at java.net.DualStackPlainSocketImpl.connect0(Native Method)
        at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
        at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
        at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
        at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
        at java.net.PlainSocketImpl.connect(Unknown Source)
        at java.net.SocksSocketImpl.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
        at sun.security.ssl.SSLSocketImpl.<init>(Unknown Source)
        at sun.security.ssl.SSLSocketFactoryImpl.createSocket(Unknown Source)
        at InstallCert.main(InstallCert.java:83)

                  New to ADSelfService Plus?