Question

无法使用Apache Commons Email通过Gmail发送电子邮件。问题是什么？

Email email = new SimpleEmail();
        email.setHostName("smtp.gmail.com");
        email.setSmtpPort(587);
        email.setTLS(true);
        email.setAuthenticator(new DefaultAuthenticator("mymail@gmail.com", "mypassword"));
        email.setFrom("mymail@gmail.com");
        email.setSubject("TestMail");
        email.setMsg("This is a test mail ... :-)");
        email.addTo("sendmail@gmail.com");
        email.send();

错误：

Exception in thread "main" org.apache.commons.mail.EmailException: Sending the email to the following server failed : smtp.gmail.com:587
    at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1242)
    at org.apache.commons.mail.Email.send(Email.java:1267)
    at MailService.sendSimpleMail(MailService.java:51)
    at MailService.main(MailService.java:17)
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 587;
  nested exception is:
    java.net.ConnectException: Connection refused: connect
    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:310)
    at javax.mail.Service.connect(Service.java:169)
    at javax.mail.Service.connect(Service.java:118)
    at javax.mail.Transport.send0(Transport.java:188)
    at javax.mail.Transport.send(Transport.java:118)
    at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1232)
    ... 3 more
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:519)
    at java.net.Socket.connect(Socket.java:469)
    at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:233)
    at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
    at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1359)
    ... 10 more

Answer 1

有什么问题？

Could not connect to SMTP host

（直接从你似乎忽略的异常输出中复制。）

Answer 2

请设置email.setDebug（true）; 使用此命令，您可以知道您的确切问题是什么也许你的用户名和密码错误

Answer 3

如果您使用的是常规Gmail帐户或Google Apps电子邮件帐户，则Gmail可能会阻止当前域。请确保您具有从其他应用程序发送邮件的足够权限。

无法使用Apache Commons Email通过Gmail发送电子邮件。

3 个答案: