D G Teed wrote:
We send non-delivery responses. If someone emailed [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>, it will reject, saying that user doesn't exist. Our users expect this feature. If we told them bad addresses will cause email to be lost without notification, they would not be happy.
If you reject the invalid users during SMTP, you are not sending NDRs. It is the responsibility of the last server that accepted the message to send a NDR. If your server is actually sending the NDRs, you have something configured wrong as you are accepting and then later rejecting the emails.
