System.Exception: Mailer.SendSMTP() Failed

Nepethya Rana

I got below exception and i didnot understand what could be the reason. it supposed send email with an attachment of 45 mb size file. other is able to send email via same smtp server. please help me. thank you.

System.Exception: Mailer.SendSMTP() Failed: System.Net.Mail.SmtpException: Mailbox unavailable. The server response was: 5.7.0 Message Size Violation at System.Net.Mail.DataStopCommand.CheckResponse(SmtpStatusCode statusCode, String serverResponse) at System.Net.Mail.SmtpConnection.OnClose(Object sender, EventArgs args) at System.Net.ClosableStream.Close() at System.Net.Mail.MailWriter.Close() at System.Net.Mail.SmtpClient.Send(MailMessage message)

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Amit Gupta9y ago
Each domain server have its own size limit for sending emails. Just make sure that the file size is under the max limit , even a couple of bytes will leads to failure of your message.

Which domain server, you are using, if this was a commercial then do contact the customer support for this issue.
+1
Nepethya Rana9y ago
Is there any other way? I did not understand what was the real issue here is.
+1
Jitendra Shekhawat9y ago
https://www.codeproject.com/Articles/16578/SendSmtp-a-command-line-utility-to-send-e-mails-vi

http://www.virtualobjectives.com.au/utilitiesprogs/sendsmtp.htm
+1