I'm half the IT department at a small company. We have our web host provide us with pop3 email accounts. Usually everything works fine. Recently the boss forwarded an email to me which he claims was not delivered to one of our co-workers. I looked at the email and it is looks like it should have been delivered. I'm reasonably confident that the intended recipient did not delete it accidently. Both use Outlook 2000.
Any idea on where to start trying to figure this out? Is there any legitimate potential cause other than user error?