无法发送该消息SMTP服务器需要安全连接或客户端未通过身份验证.服务器响应为:5.5.1需要身份验证. [英] The message could not be sentThe SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.

问题描述

我使用了smtp:-gmail和端口587，但此消息出现了
请帮帮我.

无法发送该消息SMTP服务器需要安全连接或客户端未通过身份验证.服务器响应为:5.5.1需要身份验证.在

i have using smtp:- gmail and port 587 but this message appear
Please help me.

The message could not be sentThe SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at

推荐答案

中了解更多信息错误消息非常清晰:

The error message is pretty clear:

The SMTP server requires a secure connection or the client was not authenticated

5.5.1 Authentication Required

提供客户端(即发件人)登录详细信息，否则它将无法发送消息.
这里有一个有效的示例:在以下位置发送电子邮件带有或不带有附件的C#:通用例程. [

Provide the client (i.e. the sender) login details, or it cannot send the message.
There is a sample here that works: Sending an Email in C# with or without attachments: generic routine.[^]

检查代码凭据在您的代码中是否正确.

check the code credential is proper in ur code.

您应该转到gmail帐户并确认您的主机的IP地址，然后尝试发送邮件，并看到这对您有用，我的朋友....

you should go to gmail account and confirm the Ip address your host then try to send and see this is work for you my friend....

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