无法连接到SMTP主机：{remote-server}，端口：{port}，响应：-1 [英] Could not connect to SMTP host: {remote-server}, port: {port}, response: -1

问题描述

我正在尝试使用Java Mail API发送邮件。但是上面的
消息给我带来了例外。

I am trying to send mail using java mail api. But exception is come to me with above message.

无法连接到SMTP主机：{remote-server}，端口：{port}，响应：-1

Could not connect to SMTP host: {remote-server}, port: {port}, response: -1

响应：-1

我在api手册中找不到此代码。

I can`t found this code in api manual.

推荐答案

响应代码 -1 表示JavaMail无法从SMTP服务器获得有效的响应代码。您可以查看相关的源此处。

A response code of -1 means that JavaMail failed to get a valid response code from the SMTP server. You can view the relevant source here.

最有可能的是，您的属性设置不正确或存在网络问题，例如防火墙阻止了连接。

Most likely, you either have your properties set incorrectly or you have a networking issue such as a firewall blocking the connection.

您可以尝试启用调试模式（ session.setDebug（true））。如果您需要进一步的帮助，请发布您的代码。

You might try enabling debug mode (session.setDebug(true)). Please post your code if you need further help.

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