Help with Alerting

I setup alerting for a group of folks, and they are

not getting the pages. Can someone tell me

where I went wrong. Here's the config:

HOST=sys002,sys003,sys004,sys005,sys3001,nu002,net003, \

 u004,unx013,net004,com001,com003,com004,com005, \

 unx006,unx012,com002  SERVICE=conn,disk,http,ldap,ports,memory

 MAIL user1 at mydomain.com REPEAT=20 COLOR=RED RECOVERED

 MAIL user2 at mydomain.com REPEAT=20 COLOR=RED,YELLOW RECOVERED

 MAIL user3 at mydomain.com REPEAT=20 COLOR=RED RECOVERED

 MAIL user4 at mydomain.com REPEAT=20 COLOR=RED,YELLOW RECOVERED

I also added these:

HOST=sysdu* SERVICE=conn,disk

MAIL DB_TEAM at mydomain.com REPEAT=90 COLOR=RED RECOVERED

HOST=unixdu* SERVICE=conn,disk

MAIL DB_TEAM at mydomain.com.com REPEAT=90 COLOR=RED RECOVERED

All the hosts have a similar name for the db systems...sysdu001, sysdu002 or unixdu1, unixdu2

Thanks for the help.

James