I just installed CU1 yesterday on my Exchange 2013 server. Everything seemed to go fine, but afterwards I noticed that I am getting an email quarantined from the anti-spam service every 5 minutes. I have a mailbox setup separately just for quarantine, and every 5 minutes it gets an email with the subject "Inbound Proxy Probe" sent toHealthMailbox26ad9b8b3d0140969a93a0311000cae0@ furniturebank.local. Any info on this?
P.S. These emails happen exactly every 5 minutes, so it is getting over 300 emails a day.