Email alerts not working

I am not getting some email alerts that were previously working. The alarms seem to be making it to the alerting bus but for some reason it is saying that no addresses are found for the message. Ive checked and everything in the alerting notification tables is correct, and it has been working until recently.

INFO | jvm 2 | 2011/11/08 14:45:49 | TRACE [alarms ] [14:45:49,672]: Profile "alarms" received alert: SQLTags.default.Central Facility 03/Comp_Stat.Comp Status - 2 - 1.0 - Tue Nov 08 14:45:49 MST 2011 - Central Facility Comp 1&2 Overflow Tank Level Alarm - Value = 1.0 INFO | jvm 2 | 2011/11/08 14:45:49 | 0 = Normal INFO | jvm 2 | 2011/11/08 14:45:49 | 1 = Alarm INFO | jvm 2 | 2011/11/08 14:45:49 | Comp Status INFO | jvm 2 | 2011/11/08 14:45:49 | active INFO | jvm 2 | 2011/11/08 14:45:49 | INFO | jvm 2 | 2011/11/08 14:45:49 | DEBUG [alarms ] [14:45:49,673]: Not emailing alert 'Central Facility 03/Comp_Stat', no addresses found for message.

What kind of alert profile is this? Basic or Distribution List?