用gmail发送电子邮件时出错

Question

我有以下代码：

 Email email = new SimpleEmail();
    email.setHostName("smtp.googlemail.com");
    email.setSmtpPort(465);
    email.setAuthenticator(new DefaultAuthenticator("[e-mail]", "XXXXXX"));
    email.setSSLOnConnect(true);
    email.setFrom("[e-mail]");
    email.setSubject("TestMail");
    email.setMsg("This is a test mail ... :-)");
    email.addTo("[e-mail]");
    email.send();

我无法连接到gmail，连接出现错误，但是所有连接信息都是正确的，不知道是什么阻止了我发送电子邮件的代码中的连接，我无法发送简单的电子邮件，我一点也不知道它是什么。

 org.apache.commons.mail.EmailException: Sending the email to the following server failed :                                                          smtp.googlemail.com:465
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1410)
at org.apache.commons.mail.Email.send(Email.java:1437)
at com.observatorioLegislativo.util.EmailTeste.enviaEmailSimples(EmailTeste.java:27)
at com.observatorioLegislativo.util.EmailTeste.<init>(EmailTeste.java:13)
at com.observatorioLegislativo.bean.Teste.main(Teste.java:41)
Caused by: javax.mail.MessagingException: Could not connect to SMTP host: smtp.googlemail.com,  port: 465;
 nested exception is:
java.net.ConnectException: Connection timed out: connect
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1972)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:642)
at javax.mail.Service.connect(Service.java:317)
at javax.mail.Service.connect(Service.java:176)
at javax.mail.Service.connect(Service.java:125)
at javax.mail.Transport.send0(Transport.java:194)
at javax.mail.Transport.send(Transport.java:124)
at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1400)
... 4 more


Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:317)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:207)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1938)
... 11 more

感谢您的帮助

Answer 1

当我试图使用SimpleEmail从ktor服务器应用程序发送电子邮件时，我也遇到了这种情况。我的情况不同之处在于，我在自定义g-suit域中打开了两步验证，并且无法使用“不太安全的应用程序”设置：

此设置不适用于启用了两步验证的帐户。此类帐户需要特定于应用程序的密码才能访问不太安全的应用程序

我生成了应用程序专用密码并使用它来代替我的主gmail密码，它起作用了。

        val email = SimpleEmail()
        email.hostName = "smtp.gmail.com"
        email.setSmtpPort(587)
        email.setAuthenticator(DefaultAuthenticator("[e-mail]", "APPLICATION_SPECIFIC_PASSWORD"))
        email.isSSLOnConnect = true
        email.setFrom("[e-mail]")
        email.subject = "TestMail"
        email.setMsg("This is a test mail... :-)")
        email.addTo("[e-mail]")
        email.send()

创建应用密码信息

Answer 2

不需要将其放入try and catch中，只需更改gmail中的设置以允许不太安全的应用程序即可。

只需转到：

1.我的账户

2.只要打开它，它就会完成。

img：安全访问映像

Answer 3

我相信这段代码摘自《Apache Commons电子邮件API用户指南》。

默认情况下，出于安全原因，GMail会阻止不太安全的应用程序的访问，所以这可能会导致你的问题（就像我的问题一样）。

登录您的GMail帐户并转到以下URL：

<代码>https://www.google.com/settings/security/lesssecureapps

设置为启用。

Email email = new SimpleEmail();

try {
    email.setHostName("smtp.googlemail.com");
    email.setSmtpPort(465);
    email.setAuthenticator(
        new DefaultAuthenticator("[e-mail]", "password"));
    email.setSSLOnConnect(true); // disable in case of EmailException
    email.setFrom("[e-mail]", "Hogwarts School");
    email.setSubject("Hogwarts Acceptance Letter");
    email.setMsg("We are pleased to inform you that you have a place at "
        + "Hogwarts School of Witchcraft and Wizardry.");
    email.addTo("[e-mail]");
    email.send();

} catch(EmailException ee) {
    ee.printStackTrace();
}

免责声明：

这样做，你就禁用了GMail的一个安全功能。自行承担风险（或使用虚假电子邮件）。

相关阅读：通过Apache Commons电子邮件使用GMail SMTP发送电子邮件