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      1. 服务器响应是: 5.7.0 必须首先发出 STARTTLS 命令.i16sm1806350pag.18 - gsmtp

        The server response was: 5.7.0 Must issue a STARTTLS command first. i16sm1806350pag.18 - gsmtp(服务器响应是: 5.7.0 必须首先发出 STARTTLS 命令.i16sm1806350pag.18 - gsmtp)
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                  本文介绍了服务器响应是: 5.7.0 必须首先发出 STARTTLS 命令.i16sm1806350pag.18 - gsmtp的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我正在尝试使用 gmail 发送邮件,但遇到异常 SMTP 服务器需要安全连接或客户端未通过身份验证.服务器响应是: 5.7.0 必须首先发出 STARTTLS 命令.i16sm1806350pag.18 - gsmtp

                  I am trying to send mail using gmail, and I am getting an exception that is The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first. i16sm1806350pag.18 - gsmtp

                  我为发送邮件编写的代码是:

                  code I have written for sending mail is:

                  MailMessage mail = new MailMessage(); 
                  mail.To.Add(txtEmail.Text.Trim()); 
                  mail.To.Add("Secondry@gmail.com");
                  mail.From = new MailAddress("mysendingmail@gmail.com");
                  mail.Subject = "Confirmation of Registration on Job Junction.";
                  string Body = "Hi, this mail is to test sending mail using Gmail in ASP.NET";
                  mail.Body = Body;
                  mail.IsBodyHtml = true;
                  SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
                  // smtp.Host = "smtp.gmail.com"; //Or Your SMTP Server Address
                  smtp.Credentials = new System.Net.NetworkCredential("mysendingmail@gmail.com", "password");
                  // smtp.Port = 587;
                  //Or your Smtp Email ID and Password
                  smtp.UseDefaultCredentials = false;
                  // smtp.EnableSsl = true;
                  smtp.Send(mail);
                  

                  请告诉我解决方案,我没有针对此异常的任何解决方案.

                  Please tell me solutions, I am not getting any solutions for this exception.

                  推荐答案

                  步骤(1): smtp.EnableSsl = true;

                  如果还不够:

                  步骤 (2): 必须使用 为 NetworkCredential 使用的 Gmail 帐户启用访问不太安全的应用程序"href="https://www.google.com/settings/u/1/security/lesssecureapps" rel="noreferrer">google 的设置页面:

                  Step (2): "Access for less secure apps" must be enabled for the Gmail account used by the NetworkCredential using google's settings page:

                  这篇关于服务器响应是: 5.7.0 必须首先发出 STARTTLS 命令.i16sm1806350pag.18 - gsmtp的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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