[Xymon] Alerts Mail Problem

Dear Xymon,

Thanks for your open source licensed software,,i have a trouble configure on the e-mail alert, i had add the mail and following the example, but i cannot get the alerts mail....would u pls help to solve the problem.

/home/xymon/server/etc/alerts.cfg

HOST=HomePC1 MAIL stephenwong1015 at gmail.com SERVICE=rdp REPEAT=1h HOST=HomePC2 MAIL stephenwong1015 at gmail.com SERVICE=rdp DURATION>5 COLOR=red

Thanks and Regards Stephen