Error:System.Net.Mail.SmtpException: Transaction failed. The server response was: 5.7.1 : Sender address rejected: Access denied at System.Net.Mail.RecipientCommand.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 CLS_Email.sendEmail(String emailTo_In, String emailFrom_In, String subject_In, String emailBody_In, String attachment_In, Boolean isBodyHtml)
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