问题描述
SMTP服务器需要安全连接,或者客户端未通过身份验证。服务器响应为:5.7.57 SMTP;客户端未通过身份验证可以在[BYAPR21CA0017.namprd21.prod.outlook.com]的邮件中发送匿名邮件
以下是我的代码:
public static string SendMail(string ToEmail,string Subj,string Message,string mailHostAdd,string mailSenderId,string mailPassword)
{
try
{
ServicePointManager.SecurityProtocol = (SecurityProtocolType)192 | (SecurityProtocolType)768 | (SecurityProtocolType)3072 | SecurityProtocolType.Tls12;
//string HostAdd = mailHostAdd.ToString();
string HostAdd = "smtp.office365.com";
string FromEmailid = mailSenderId.ToString();
string Pwd = mailPassword.ToString();
System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(FromEmailid.ToString(),ToEmail.ToString(),Subj.ToString(),Message.ToString());
message.IsBodyHtml = true;
SmtpClient mailclient = new SmtpClient();
NetworkCredential smtpuser = new NetworkCredential(FromEmailid,Pwd);
SmtpClient smtp = new SmtpClient();
smtp.UseDefaultCredentials = false;
smtp.Credentials = smtpuser;
smtp.Port = 587;
smtp.Host = HostAdd;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.EnableSsl = true;
message.DeliveryNotificationoptions = DeliveryNotificationoptions.OnSuccess;
smtp.Send(message);
return "Mail sent successfully!";
}
catch (Exception ex)
{
return ex.Message.ToString();
}
请帮助。
解决方法
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