What are these entries?

21-Oct-2008 04:04:11.490 client 216.105.64.171#59400: query: SMA::localhost
IN A +
21-Oct-2008 04:04:11.494 client 216.105.64.171#59403: query: SMA::localhost
IN A +
21-Oct-2008 04:04:11.496 client 216.105.64.171#59404: query: SMA::localhost
IN A +
21-Oct-2008 04:04:11.497 client 216.105.64.171#59405: query: SMA::localhost
IN A +

I've never seen an SMA:: query before. It's obviously some sort of
misconfigured host (there are THOUSANDS of these queries) but I don't know
where to look to clean it up.

--
Scott Baker - Canby Telcom
RHCE - System Administrator - 503.266.8253