crm 2011 e-mail router not receiving email ?

I set my log level to 3, and verified that the log file is being written to when I started the 'MS CRM Email Router' service.

Next, I sent a email to the mailbox, and verified that the mailbox received the email.

But the Log file does not show anything new <-- should the log show that it received the email ?

(Background : I am trying to trouble shoot a plugin that stopped working )

Thanks,Peter