When outside senders send emails with attachments over 10mb, they get the following NDR:
5.3.4 Message size exceeds fixed maximum (state 18)
I went into exchange management console, hub transport, global settings, right click on transport settings, properties, unchecked max recieve size, max send size, which i assumed would default the max recieve size and max send size to unlimited. then i went into services and restarted the microsoft exchange transport service.
However i tried sending an email with a large attachment from an external email and still received the same NDR at that email.
Was there something I overlooked or am i not doing something right?