问题
Email email = new SimpleEmail();
String authuser = "......@gmail.com";
String authpwd = "*******";
// Very Important, Don't use email.setAuthentication()
email.setSmtpPort(465);
email.setAuthenticator(new DefaultAuthenticator(authuser, authpwd));
email.setDebug(true); // true if you want to debug
email.setHostName("smtp.gmail.com");
email.getMailSession().getProperties().put("mail.smtp.auth", "true");
email.getMailSession().getProperties().put("mail.debug", "true");
email.getMailSession().getProperties().put("mail.smtp.port", "465");
email.getMailSession().getProperties().put("mail.smtp.socketFactory.port", "465");
email.getMailSession().getProperties().put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
email.getMailSession().getProperties().put("mail.smtp.socketFactory.fallback", "false");
email.getMailSession().getProperties().put("mail.smtp.starttls.enable", "true");
email.setFrom("........@gmail.com", "SenderName");
email.setSubject("TestMail");
email.setMsg("This is a test mail?");
email.addTo(".............@gmail.com", "ToName");
email.send();
and it gives the following exception
SEVERE: org.apache.commons.mail.EmailException: Sending the email to the following server failed : smtp.gmail.com:465
回答1:
The Commons Email user guide has an example for Gmail using SSL.
https://commons.apache.org/proper/commons-email/userguide.html
SSL/TLS (Port 465) -> email.setSSLOnConnect(true);
Email email = new SimpleEmail();
email.setHostName("smtp.gmail.com");
email.setSmtpPort(465);
email.setAuthenticator(new DefaultAuthenticator("username", "password"));
email.setSSLOnConnect(true);
email.setFrom("user@gmail.com");
email.setSubject("TestMail");
email.setMsg("This is a test mail ... :-)");
email.addTo("foo@bar.com");
email.send();
STARTTLS (Port 587) -> email.setStartTLSEnabled(true);
Email email = new SimpleEmail();
email.setHostName("smtp.gmail.com");
email.setSmtpPort(587);
email.setAuthenticator(new DefaultAuthenticator("username", "password"));
email.setStartTLSEnabled(true);
email.setFrom("user@gmail.com");
email.setSubject("TestMail");
email.setMsg("This is a test mail ... :-)");
email.addTo("foo@bar.com");
email.send();
回答2:
This does work for me
Email email = new SimpleEmail();
String authuser = "...@gmail.com";
String authpwd = "xxxx";
email.setSmtpPort(587);
email.setAuthenticator(new DefaultAuthenticator(authuser, authpwd));
email.setDebug(true);
email.setHostName("smtp.gmail.com");
email.getMailSession().getProperties().put("mail.smtps.auth", "true");
email.getMailSession().getProperties().put("mail.debug", "true");
email.getMailSession().getProperties().put("mail.smtps.port", "587");
email.getMailSession().getProperties().put("mail.smtps.socketFactory.port", "587");
email.getMailSession().getProperties().put("mail.smtps.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
email.getMailSession().getProperties().put("mail.smtps.socketFactory.fallback", "false");
email.getMailSession().getProperties().put("mail.smtp.starttls.enable", "true");
email.setFrom("........@gmail.com", "SenderName");
email.setSubject("TestMail");
email.setMsg("This is a test mail?");
email.addTo("xxxx@gmail.com", "ToName");
email.setTLS(true);
email.send();
回答3:
Don't you need to tell Commons Email that you're sending a TLS email:
email.setTLS(true);
prior to your call to email.send()?
I'm not sure if this will fix what ails you, since I'm not sure whether you're experiencing a problem connecting to smtp.gmail.com:465 or successfully sending to it (the error message/exception is ambiguous as you've presented it), but it's definitely something that's missing so far as I can tell.
来源：https://stackoverflow.com/questions/1783710/sending-an-email-using-commons-email-to-gmail