We have an external client that is reporting that when she sends us an email without an attachement they go through. But when she sends an email to us with a small pdf attachment she is getting back the following message:
Delivery is delayed to these recipients or distribution lists:
Subject: RE: XXXXXX
This message has not yet been delivered. Microsoft Exchange will continue to try delivering the message on your behalf.
Delivery of this message will be attempted until 1/16/2013 8:49:29 AM (GMT-05:00) Eastern Time (US & Canada). Microsoft Exchange will notify you if the message can't be delivered by that time.
I'm at a loss. I checked out mail troubleshooter and could not find any of the emails she is reporting. I checked our spam soap reports and they are not there as well as quarantined email - even then the users should get a bounce back of the issue as to why the message was rejected. I have checked our hub transports queues and they are not there.
Kind of looks like it is sitting in their queue?