OEM 11g Not alerting of critical status...

List,

  I have an OEM 11g, with a 10.2.0.4.0 RAC target with 4 nodes. There are no
monitoring templates configured in OEM. There is a notification rule set for
'Database Instances' (I'm assuming this also includes cluster database
instances, but there is a 'Cluster Database' target type possible in the
notification rules... so I'm not sure.

  We have other targets that are sending e-mail alerts and that's fine, but
I have no record of any alert generated from this RAC. What's more, I tried
to force an alert (set a very low threshold for a particular tablespace).
The alert was generated in EM, but no e-mail was sent. The schedule is 24/7
and the email address is correct.

  I am using sysman.

  What is even more weird, is that I have tablespaces well over the warning
threshold and some even past the critical threshold, and there isn't even an
alert in EM for them. I am at a loss as to even how to start to investigate
this...

  Oh, and I inherited this system and the person that set up EM si no longer
available...

   Any ideas? docs? links? magic 8 balls?

thanks :-)
Alan.-

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