Proofpoint Mail Delivery Issues

[Tim Donahue <tdonahue () donahuetechnology com>]

Hi all,

Sorry for the noise, but one of my clients is getting the standard "it's the other guy's fault" with some email 
delivery issues to/from Proofpoint "Enterprise" customers.  If there is anyone from Proofpoint support monitoring this 
list, some assistance troubleshooting email delivery issues would be greatly appreciated.

Thank you,

Tim Donahue