Error message when sending email

1

Sending emaisl worked perfectly, but now i suddenly get the following error message when trying to send an email:

Vaandel Uitgewers⁠ — Sales Invoice ⁠— View .btn-primary, .btn-danger, .btn-success, .btn-info, .btn-warning { box-shadow: 0 1px 0 rgba(255,255,255,0.5) inset; }@media print {body { -webkit-print-color-adjust: exact !important; padding: 0; margin: 0; font-size: 10pt; font-family: sans-serif; line-height: 125%; background: none !important; }.print-display-none, .btn { display: none !important }a { color: #000; text-decoration: none }}

System.Net.Mail.SmtpException: System.Net.Mail.SmtpException: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Authentication Required. Learn more at
at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)
at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte command, MailAddress from, Boolean allowUnicode)
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 ManagerServer.HttpHandlers.Businesses.Business.SendEmail.Post()

2

Read the Guide about troubleshooting email and provide the requested information. Also provide detailed information about everything that has changed since email last worked, and when.

3

Hi Tut

I am using Manager Desktop the latest version
Windows 7 professional.

“The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Authentication Required”.
Error message: " Vaandel Uitgewers — Email Settings ⁠— Edit .btn-primary, .btn-danger, .btn-success, .btn-info, .btn-warning { box-shadow: 0 1px 0 rgba(255,255,255,0.5) inset; }@media print {body { -webkit-print-color-adjust: exact !important; padding: 0; margin: 0; font-size: 10pt; font-family: sans-serif; line-height: 125%; background: none !important; }.print-display-none, .btn { display: none !important }a { color: #000; text-decoration: none }}

4

Saying that you are using “Manager Desktop the latest version” is ambiguous - please state the number of the version you are using

Also you need to read and follow the instructions in the email troubleshooting guide, as indicated by Tut - Troubleshoot email issues

Then you need to explain what email service you are attempting to use and post edit screens of the parameters you have set for email