blocking from xp_sysmail_format_query waittype of preemptive_os_getprocaddress

Hi!

We have a hung process with wait type of preemptive_os_getprocaddress. The process's last statement was xp_sysmail_format_query. I tried killing the proc, but now it just in killed/rollback status. It's a production server so don't want to reboot until the evening or weekend. Has anone ran into this issue and is there a fix without rebooting the box? We are running SQL 2008 R2. Version is 10.50.1702.

Thanks in advance

Raj