Issue
When attempting to send an email, the following error is logged in the ULS logs:
Failing sending email: LocalErrorInProcessing.: System.Net (https://System.Net) (system is for sale at Squadhelp.com!) .Mail.SmtpException: Error in processing. The server response was: Open relay not allowed- Customer Community at System.Net (system is for sale at Squadhelp.com!) (system is for sale at Squadhelp.com!) .Mail.RecipientCommand.CheckResponse(SmtpStatusCode statusCode, String response) at System.Net (system is for sale at Squadhelp.com!) (system is for sale at Squadhelp.com!) .Mail.RecipientCommand.Send(SmtpConnection conn, String to, String& response) at System.Net (system is for sale at Squadhelp.com!) (system is for sale at Squadhelp.com!) .Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception) at System.Net (system is for sale at Squadhelp.com!) (system is for sale at Squadhelp.com!) .Mail.SmtpClient.Send(MailMessage message) at Nintex.Workflow.HumanApproval.Message.SendMessage(SmtpClient client, MailMessage msg) (Build:3520)c713649f-b9b4-f0a3-29ad-fea8f512dc5f
Resolution
The error is being returned by the "Mimecast" mail filtering system:
Please see the following KB article
- https://community.mimecast.com/docs/DOC-1369#451
Or contact "Mimecast" support for further assistance.
Please see the following KB article
- https://community.mimecast.com/docs/DOC-1369#451
Or contact "Mimecast" support for further assistance.
