Tomcat fails to send e-mail

[edwin angarita]

Hello everyone in Javaranch, I am having a little issue and I don't know exactly how to solve it, I have a Java mail connection with a smtps server (ssh) I get the certified and everything works fine, my applications send emails without a problem, but after 15 days or a month the application start to fail, doesn't send any email and i get the following exception

Could not connect to SMTP host: localhost, port: 465
javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 465;
  nested exception is:
	java.net.ConnectException: Connection refused
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1391)
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412)
	at javax.mail.Service.connect(Service.java:288)
	at javax.mail.Service.connect(Service.java:169)
	at javax.mail.Service.connect(Service.java:189)
	at iviajes.utilitario.Utilidades.enviarCorreos(Utilidades.java:591)

the line 591 is the following

 t.connect("[e-mail]", "7654321");

that's the line where i connect to the sender email and my password

but if I restart my tomcat the java mail start working again
this problem is driving my crazy, please i will appreciate any help!!!

[Madhan Sundararajan Devaki]

One possibility could be, there are stale connections with the SMTP server which after sometime somehow interfere with your new connections. Examine the code to see, if you have released the connection resources completely.