Having numerous inbound email delays from 2-4 hours from external senders. Have a ticket open with Microsoft Exchange Online Protection where our inbound mail hits first and then to our Internal Smart Host spam filter which passes it to Exchange 2010.
Our Smart Host spam filter is using (Server 2003) IIS 6 and on the SMTP Virtual Server under Current Sessions I see alot of sessions to Exchange Online Protection with Connected Time anywhere from 0 and 5 seconds to 286 seconds. Is there a log to show why the Connected Time is extremely high or is this normal? I'm assuming all SMTP connections should be a few seconds only when refreshed.