Source: jProgBusiness - The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first. mz11sm1377223qcb.39 at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response) at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, String from) at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception) at System.Net.Mail.SmtpClient.Send(MailMessage message) at jProgBusiness.jBusiness.PMEmailSchedulerAdministrator.SendEmail(jUser user, String EmailAddress, String EmailSubject, String EmailMsg) at jProgBusiness.jBusiness.PMEmailSchedulerAdministrator.SendEmail(String LoginToken, String EmailAddress, String EmailSubject, String EmailMsg) at jProgBusiness.jBusiness.jBusinessRemote.PMES_SEND_EMAIL(String LoginToken, String EmailAddress, String EmailSubject, String EmailMessage) An error occurred in PMES_SEND_EMAIL. If the problem persists, please contact technical support.