greenmail java_Java - 非root用户启动icegreen.greenmail报错问题分析

错误信息如下：

Exception in thread "Thread-0" java.lang.RuntimeException: java.net.BindException: Permission denied (Bind failed)

at com.icegreen.greenmail.smtp.SmtpServer.run(SmtpServer.java:54)

Caused by: java.net.BindException: Permission denied (Bind failed)

at java.base/java.net.PlainSocketImpl.socketBind(Native Method)

at java.base/java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:436)

at java.base/java.net.ServerSocket.bind(ServerSocket.java:395)

at java.base/java.net.ServerSocket.(ServerSocket.java:257)

at com.icegreen.greenmail.AbstractServer.openServerSocket(AbstractServer.java:51)

at com.icegreen.greenmail.smtp.SmtpServer.run(SmtpServer.java:48)

问题分析：

Permission denied(Bind failed)：权限限制(绑定失败)

由于java脚本中启动greenmail时，配置了使用25端口。在实际中java程序绑定低于1024端口都会报出上述错误信息。

解决方法：使用ServerSetup类配置使用3025端口来启动SMTP。

import com.icegreen.greenmail.util.GreenMail;

import com.icegreen.greenmail.util.GreenMailUtil;

import com.icegreen.greenmail.util.ServerSetup;

public class GreenMailTest

{

private GreenMail greenMail;

@Before

public void startMailServer()

throws Exception

{

ServerSetup setup = new ServerSetup(3025,"localhost","smtp");

greenMail = new GreenMail(setup);

greenMail.setUser("[e-mail]","123456");

greenMail.start();

}

...

}

当然，向greenmail server发送邮件时，也需要连接3025端口。