SMTP 错误代码：551

Question

com.sun.mail.smtp.SMTPSendFailedException: 551 This mail server requires authentication before sending mail from a locally hosted domain. Please reconfigure your mail client to authenticate before sending mail.

我在 Tomcat 服务器

上与我的 Java 应用程序运行ning 集成时出现上述错误

如果我在单独的 class 和运行中使用与 java 应用程序

相同的属性，则发送成功

为什么我没有得到这个？提前谢谢你。

Answer 1

Finally got answer
Here we go: before it was like
`Properties props = new Properties();
props.put("mail.smtp.host", "webmail.technobbyte.com");
props.put("mail.smtp.port", "25");
props.put("mail.smtp.starttls.enable", true);
props.put("mail.smtp.auth", true);`


now i changed to:
`Properties props = new Properties();
props.setProperty("mail.smtp.host", "webmail.technobbyte.com");
props.setProperty("mail.smtp.port", "25");
props.setProperty("mail.smtp.starttls.enable", "true");
props.setProperty("mail.smtp.auth", "true");`

SMTP 错误代码：551

SMTP error code : 551

jakarta-mail

javax.activation