java - 尝试在 Grails 中发送 SimpleMailMessage 时必须首先发出 STARTTLS 命令

Question

我尝试在 grails 应用程序中发送消息。我使用 Java 代码来解决这个问题，这是我的代码

SimpleMailMessage message_ref = new SimpleMailMessage();
JavaMailSenderImpl sender_ref = new JavaMailSenderImpl();

           sender_ref.setHost("smtp.gmail.com")
           sender_ref.setUsername("<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="5f2b3a2c2b1e3c3c302a312b1f38303038333a323e3633713c3032" rel="noreferrer noopener nofollow">[email protected]</a>")
           sender_ref.setPassword("topsecret")
           message_ref.setTo("<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="98ecfdebeccafdfbf1e8f1fdf6ecd8fff5e0b6fcfd" rel="noreferrer noopener nofollow">[email protected]</a>")
           message_ref.setSubject("Hello there")
           message_ref.setText("How are you")
           sender_ref.send(message_ref)

我遇到以下异常:

SMTPSendFailedException: 530 5.7.0 Must issue a STARTTLS command first

我在 stackoverflow 上发现了类似的问题 Must issue a STARTTLS command first. Sending email with Java and Google Apps 但这对我没有帮助，因为他使用了不同的方法。

谁能告诉我出了什么问题吗？我预计错误不在代码中，而是在某些配置文件中，这就是我的知识边缘。

Answer 1

引自Grails mail plugin文档:

grails {
   mail {
     host = "smtp.gmail.com"
     port = 465
     username = "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="b9c0d6cccbd8dad6ccd7cdf9ded4d8d0d597dad6d4" rel="noreferrer noopener nofollow">[email protected]</a>"
     password = "yourpassword"
     props = ["mail.smtp.auth":"true",                     
              "mail.smtp.socketFactory.port":"465",
              "mail.smtp.socketFactory.class":"javax.net.ssl.SSLSocketFactory",
              "mail.smtp.socketFactory.fallback":"false"]
} }