Sending mail is correct from localhost.But did not work from internet space(web)

Question

I can send email from localhost.But when I sent an email from internet space I encountered a problem. Is the problem in website panel? How can I solve it?

System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response) at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception)

at System.Net.Mail.SmtpClient.Send(MailMessage message)

at Defraz.Movafaqiyat.WebApp.usercontrols.AppCodes.MailHelper.SendMailMessage(String from, String to, String bcc, String cc, String subject, String body, String domainName, Boolean isBodyHtml)

a part of webconfig:

<smtp from="[email protected]">
    <network host="smtp.gmail.com" port="587" userName="[email protected]" password="mypassword" defaultCredentials="false" enableSsl="true" />
  </smtp>

If I were in your shoes I'd contact hosting provider. It could be some network related issue. — brke

Galina Galina · Accepted Answer · 2013-04-08T12:56:08

Try to use port="465" (Set up POP in mail clients) and make sure this port is open on the server you use for sending email.

Sending mail is correct from localhost.But did not work from internet space(web)

1 Answers