Trying to send an email to a client, with a PDF attachment. I can send a regular email fine, but the PDF attached is not. This used to work. I am curious, is this being blocked from my end or the clients? I think clients because it says postini and I am running Exchange 2007.
Your message wasn't delivered because of security policies. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator.
The following organization rejected your message: Postini.
Postini #550 5.7.1 Message rejected as spam by Content Filtering. ##