我正在使用C#使用SMTP和gmail服务器发送电子邮件 .
以下是我用于发送电子邮件的代码 . 我遇到一些错误,即
SMTP服务器需要安全连接或客户端未经过身份验证 . 服务器响应为:5.5.1需要身份验证 .
public static bool SendEmail(string from, string[] to, string[] cc, string[] bcc, string subject, string body, bool isBodyHtml, List<Attachment> attachmentList)
{
try
{
var mailMessage = new MailMessage();
var smtpClient = new SmtpClient();
mailMessage.From = new MailAddress(from);
mailMessage.To.Add(new MailAddress(string.Join(",", to)));
if (cc != null && cc.Any())
{
mailMessage.CC.Add(new MailAddress(string.Join(",", cc)));
}
if (bcc != null && bcc.Any())
{
mailMessage.Bcc.Add(new MailAddress(string.Join(",", bcc)));
}
mailMessage.Subject = subject;
mailMessage.Body = body;
mailMessage.IsBodyHtml = isBodyHtml;
if (attachmentList != null)
{
foreach (var attachment in attachmentList)
{
mailMessage.Attachments.Add(attachment);
}
}
smtpClient.Host = "smtp.gmail.com";
smtpClient.Port = 587; //465
smtpClient.Credentials = new System.Net.NetworkCredential("username@email.com", "passsword");
smtpClient.EnableSsl = true;
smtpClient.Send(mailMessage);
return true;
}
catch (Exception ex)
{
return false;
}
}
我做错了什么以及如何使用gmail发送电子邮件 .
2 回答
您尚未将
UseDefaultCredentials
设置为false
,因此尽管您提供了凭据,但应用程序仍在尝试使用您的Windows凭据登录SMTP . 试试以下内容:UseDefaultCredentials
需要设置为false
before 您设置新的网络凭据 .如果您确定您的用户名和密码正确并且您仍然收到错误,则表示 Gmail 已阻止您的应用程序 .
尝试从这里开启Grant Access to Less Secure Apps