'Send mail through web application

I am using the following properties to send mail through web application that use jsf but I am getting an error

The properties:

String host = "smtp.gmail.com";
Properties properties = System.getProperties();
properties.put("mail.smtp.host", host);
properties.put("mail.smtp.starttls.enable","true");
properties.put("mail.smtp.socketFactory.port", "25");    
properties.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");    
properties.put("mail.smtp.auth", "true");    
properties.put("mail.smtp.port", "25");   
properties.put("mail.smtp.ssl.trust", "*");

Session session = Session.getInstance(properties, new javax.mail.Authenticator() {

    protected PasswordAuthentication getPasswordAuthentication() {

        return new PasswordAuthentication("[email protected]", "password");

    }

The error:

javax.mail.MessagingException: Unknown SMTP host: smtp.gmail.com;
  nested exception is:
    java.net.UnknownHostException: smtp.gmail.com
javaemailjsf


Solution 1:[1]

Try these on command line.

For SSL:

telnet smtp.gmail.com 465

For TLS/STARTTLS:

telnet smtp.gmail.com 587

If there's no response its a firewall issue.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Ivan Costa

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