I've a very strange problem: SOME mails (I can't see a pattern) are not shown in our Outlook Exchange Accounts, but when I check the E-Mail Security Logs (we use a SonicWall), they seem to be delivered.
Does anyone have an idea where to begin with looking? I've controlled the settings, run all available updates for Exchange 2007 and checked the logs, but no results.
Thanks for any hint, Joseph