I obtain this error when try to send a email with sendmail. The connectivity to letter server is fine, also I deserve to telnet come the mail server.

You are watching: 530 5.7 1 client was not authenticated




I think you have actually to collection UseDefaultCredentials to true: view sample powershell code

#SMTP server name$smtpServer = "abcd.com.au"$OFS = "`r`n`r`n"#Creating a mail object$msg = new-object Net.Mail.MailMessage#Creating SMTP server object$smtp = new-object Net.Mail.SmtpClient($smtpServer)$smtp.UseDefaultCredentials = $true#Creating SMTP server object$smtp = new-object Net.Mail.SmtpClient($smtpServer)$smtp.UseDefaultCredentials = $true#Email framework $msg.From = "abcd
axyz.com.au")$msg.subject = "Sample below (" + $a + " )"$msg.body = "This is sample mail" + $OFS# connect a paper $file = "C:sample.txt"$attachment = new-object System.Net.Mail.Attachment $file$msg.Attachments.Add($file)#Sending email $smtp.Send($msg)


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