Random Unexplained Email issue

[dgent]

Zen Cart will be receiving a message back from the mailserver which is where the rejection is happening.
You'll need to sort out the email problem with whoever manages the mailserver settings on the webserver.

You might find some relief as far as messages from within ZC are concerned if you change Zen Cart to use SMTPAUTH as the Email Transport method and supply SMTP user/password/host/port/etc settings.

Hi

Yes, thats what I thought, I was just wondering 'what' kind of problem it could be and why it only relates to emails sent via PHP and works fine via traditional means.