A suggestion for an alternative, because if 0x80e000c8 doesn't publish the poller as the offender, your object type/name filter won't work. You may can find other event code on which to filter for the specific poller when the error occurs, and that may work best.
However, when I'm seeking exact detail like this, I tend to set up a custom log category and then, within my processing policy (error rule maybe?) define a log action (or log from within an xslt or GWS if you need to get very specific) on a particular error condition (in your case, when error code 0x80e000c8 occurs) to log to that log category when PollerA is the offender. Then, you can configure your logging target to subscribe to that custom category and send emails far more directly.