Universal Messenger deals with different types of data:
Entries
The actual business data; for example:
Customers
Backoffice Users
Subscribers
Contacts
“Persons”
Service Desk Tickets
Events
etc.
Properties of Entries:
are stored in one (actually two) data base tables
have a customizable set of attributes
can be selected via elaborate query language / UI query generator
are receipients of emails / newsletters
can “subscribe” to Lists
can be understood as documents in a document store
Newsletters
Historically the main purpose was sending email newsletters to subscribers.
Newsletters can be created from the GUI, from external systems (CMS) or programmatically
Newsletters are queued until they are actually sent
Newsletters can be organized in Newsletter Groups
Newsletters are archived after sending
viewing a Newsletter (in an email client) or clicking links within a Newsletter can be tracked
Other management and auxiliary data objects
Mailing templates
Cron Jobs
Lists
Segments
Plugin Instances