Delivering one or more alert messages via one or more delivery methods to one or more users who have indicated an interest in receiving the alert messages. A delivery service receives an alert document and a list of receiving users. This list indicates which users desire immediate delivery, which users desire delivery at a scheduled time, a service priority and/or other delivery criteria. Any black out period or other deferral is associated with the deferring users to prevent alert delivery during those times. For scheduled deliveries, the alert message is stored on one of a plurality of storages, based on alert type, user priority, storage loads, and/or other parameters. At the scheduled time, the stored alert message is accessed and marked for immediate delivery. The alert message is delivered as an email, instant message, short message service message, and/or the like. A history is maintained of all alert deliveries.