K2MailerCampaign managers
Choose Lists, Segments, or Individual Contacts
Understand the three mutually exclusive K2Mailer campaign audience paths and how recipient eligibility is enforced.
In the app→Campaigns → Schedules → Audience
Choose one audience type per schedule
- Lists
- Select one or more tenant-owned lists. New schedules support up to 250 lists.
- Segments
- Select saved tenant-owned list or campaign-activity segments. New schedules support up to 25 segments.
- Individual Contacts
- Select explicit tenant-owned contact memberships. New schedules support up to 5,000 selected memberships.
The audience types are mutually exclusive
A single schedule uses Lists, Segments, or Individual Contacts. It does not combine all three modes in the same audience definition.
Eligibility is still checked after selection
Selecting a contact is not a promise that K2Mailer will send to that address. Campaign preparation and the final send path continue to enforce current membership, DOI, active state, global opt-out, suppression, hard-bounce, complaint, and other safety rules.
K2Mailer deduplicates eligible recipients while preserving deterministic list membership context for unsubscribe and consent behavior.
How saved audiences stay safe over time
- Segments are resolved against current data when campaign preparation runs.
- An Individual Contact that later becomes ineligible can remain visible as historical schedule context without becoming newly selectable.
- A fully deleted historical direct-contact membership is skipped rather than making the whole campaign audience invalid.
- Cross-tenant IDs and malformed stored audience definitions fail closed.
- System-paused campaigns with a durable invalid-audience reason cannot be manually resumed through the normal status action.
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