Hi everybody!

Here is my code;

Transport transport = session.getTransport("smtp");

In the line below I have an exception
transport.connect(serverIpAddress,userId,password);

( 12.12.12.12 is a replacement of real host IP):

Could not connect to SMTP host: 12.12.12.12, port: 25;
nested exception is:
java.net.ConnectException: Connection refused: no further information
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:867)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:156)
at javax.mail.Service.connect(Service.java:234)
at test1.SendMail.sendmail(SendMail.java:182)
at test1.SendMail.main(SendMail.java:314)

When I try to telnet to the host. I have reply - Could not open a connection to host: Connect failed

Other ports give me the same I tested connection within for(int port = 1; port < 999, port++)


1. I gess we have port 25 blocked for security reasons. And MS Exchange Server uses his proprietary protocol/way to send messages. What is this protocol/way? Do we need any other *.jar to use with MS Exchange Server?


2. Is any other way to send e-mail via Exchange for example to put it into some output box & Exchange Server will send it by itself?


3. What format of userId should be to use transport.connect?


4. Any other solution?


Igor Artimenko
Java Programmer
Xerox Corp.