Email Error Message

Could someone explain why I’m getting this error message when attempting to email an invoice.

System.Net.Mail.SmtpException: System.Net.Mail.SmtpException: Syntax error, command unrecognized. The server response was: 5.7.0 Mailgun is not loving your login or password
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 ManagerServer.HttpHandlers.Businesses.Business.Email.Post()

Read this Guide: Email transactions and reports | Manager.

In the future, check the Guides as your first resource. Then search for previous forum topics. This has been discussed already many times in the past week.

All sorted but took a while to get the settings required.