I have a client who sends out emails from SAP via their Exchange server.
Emails are received ok by recipients, however if an email is sent to an invalid address there is no bounceback to the sender.
Users need these bouncebacks to work.
Bounceback emails are received ok when sending from Outlook.
I have traced the issue to their Exchange 2007 server. When trying to send a test email to an invalid email address using their Acronis backup system the following message is received:
The server cannot accept DATA command.
Other Acronis setups I work with can send emails to invalid addresses (i.e. bounceback emails are received).