I would like to know if anyone is setting up POP3 in the email setup, and if setting this up would allow us to receive NDR's when they occur.  I am having trouble with one vendor who cannot get a emailed PO because apparently the mail from our authenticated user does not look like its coming from her to their third party mail filtering service  and we are trying to troubleshoot it but are not getting the communication from their server.

The TAS-C email settings tab does allow you to set up POP3, but I have no idea why. We use Evo to send Acknowledgments to customers for order confirmation and don't have any reports of problems with receiving them.