Sending Bulk EMail in asp.net using smtp gmail server

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Trying to Send Bulk EMails in asp.net using smtp gmail server getting SMTPException was unhandled by user code.

An exception of type 'System.Net.Mail.SmtpException' occurred in System.dll but was not handled in user code

Additional information: Failure sending mail.

My Code:

C#

string from = "xyxyx@gmail.com";
string to = strEmail;
MailMessage Msg = new MailMessage(from, to);
Msg.Subject = "Send Bulk mail for all users";
Msg.Body = myString;
Msg.IsBodyHtml = true;
SmtpClient a = new SmtpClient();
a.UseDefaultCredentials = true;
a.Credentials = new NetworkCredential("xxx@gmail.com", "pwdxxx");
a.EnableSsl = true;
a.Host = "smtp.gmail.com";
a.Port = 587;
a.Send(Msg);

Can anyone assist how can send mail! Thanks in advance...

Posted 3-Jul-14 21:04pm

Mannava Siva Aditya

Updated 31-Jan-17 20:36pm

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[no name] 4-Jul-14 3:26am

a.UseDefaultCredentials = false;

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Pravuprasad · Answer 1 · 2014-07-03T21:21:00

this is the code for sending mail.

C#

MailMessage mail = new MailMessage();
              mail.To.Add(_objModelMail.To); //_objModelMail is the object of user defined model class
              mail.From = new MailAddress(_objModelMail.From);
              mail.Subject = _objModelMail.Subject;
              string Body = _objModelMail.Body;
              mail.Body = Body;
              mail.IsBodyHtml = true;
              SmtpClient smtp = new SmtpClient("smtp.gmail.com");

              smtp.Port = 587;
              smtp.UseDefaultCredentials = false;
              smtp.Credentials = new System.Net.NetworkCredential
              ("uname@gmail.com","pswd");// Enter seders User name and password
              smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
              smtp.EnableSsl = true;
                  smtp.Send(mail);

             }

for further go to below link
http://www.c-sharpcorner.com/UploadFile/47548d/how-to-send-bulk-email-using-Asp-Net/[^]

Member 12976951 · Answer 2 · 2017-01-31T20:36:00

MailMessage mail = new MailMessage();
mail.To.Add(email);
mail.To.Add("xxx@gmail.com");
mail.From = new MailAddress("yyy@gmail.com");
mail.Subject = "sub";

mail.Body = body;

mail.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com"; //Or Your SMTP Server Address
smtp.Credentials = new System.Net.NetworkCredential
("yyy@gmail.com", "pw"); // ***use valid credentials***
smtp.Port = 587;

//Or your Smtp Email ID and Password
smtp.EnableSsl = true;
smtp.Send(mail);

Sending Bulk EMail in asp.net using smtp gmail server

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