send mailing using system.net.mail bad sequence of commands

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when i am sending to our company mails its working but if we use another mails like gmail,yahoo to send these mails its not working and i getting these error

Bad sequence of commands. The server response was: This mail server requires authentication when attempting to send to a non-local e-mail address. Please check your mail client settings or contact your administrator to verify that the domain or address is defined for this server

My Code is:

C#

string smtp = "smtp.companyname.com";
string mailId = "xxx@companyname.com";
string pwd = "xxxx";
System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();
            SmtpClient SmtpServer = new SmtpClient(smtp);
            mail.From = new MailAddress(mailId);
            mail.To.Add("yyy@gmail.com");
            mail.Subject = "Enquiry";
            mail.IsBodyHtml = true;
            mail.Body = "sdfsdfsd".ToString();
            SmtpServer.Credentials = new System.Net.NetworkCredential(mailId, pwd);
            SmtpServer.EnableSsl = false;
            SmtpServer.Send(mail);

Posted 6-Jun-13 0:45am

sravan_341

Updated 6-Jun-13 1:03am

Thanks7872

v2

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Dharmendra Kumar Swarnkar 8-Sep-20 4:51am

asda ada assfs adadad

1 solution

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Thanks7872 · Answer 1 · 2013-06-06T01:12:00

Refer to these links:

System.Net.Mail FAQ[^]

Sending Mail Using Net.Mail With Authentication[^]

how to send mail from local[^]

Try

C#

SmtpServer.EnableSsl = true;

Try the below code which uses gmail.

C#

MailMessage mail = new MailMessage();
mail.From = new MailAddress("gmail_Id@gmail.com");
mail.To.Add(new MailAddress(to_address));
mail.Subject = "your subject";
mail.IsBodyHtml = true;
mail.Body = Body here;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.Credentials = new System.Net.NetworkCredential("gmail_Id@gmail.com", "12345");
smtp.EnableSsl = true;
smtp.Send(mail);