Hi, I am getting the following error when I run remote connectivity analyzer. We have a hybrid setup as well.
Attempting to send a test e-mail message to administrator@domain.com using MX smtp.server.net.
Delivery of the test message failed.
Additional Details
The server returned status code 550 - Mailbox unavailable. The server response was: #5.1.0 Address rejected.
Exception details:
Message: Mailbox unavailable. The server response was: #5.1.0 Address rejected.
Type: System.Net.Mail.SmtpFailedRecipientException
Stack trace:
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 Microsoft.Exchange.Tools.ExRca.Tests.SmtpMessageTest.PerformTestReally()