Mailster stores its records in tables like wp_mailster_subscribers, wp_mailster_lists, and the post-based campaigns custom post type. Each campaign carries a status that walks from draft to queued to active to finished, with paused in between. Each subscriber carries a status from pending to subscribed to unsubscribed and hardbounced or softbounced. The Mailster admin renders all of this in long sortable tables with filter dropdowns, which is fine for a single edit but useless for understanding the shape of the pipeline.

SleekView Kanban reads the same tables and uses those status columns as the natural way to group cards. A campaigns board lines up draft, queued, active, and finished, with a paused column for items operators have halted. A subscribers board lines up pending, subscribed, unsubscribed, hardbounced, and softbounced. Card fronts surface the campaign subject, scheduled time, or open rate for campaigns, and the subscriber name, signup source, or last activity for contacts.

Dragging a draft campaign into queued writes back through Mailster and triggers the scheduler. Pausing an active campaign halts the cron sender. Moving a softbounced subscriber back to subscribed runs Mailster's bounce logic, so the board only ever reaches states Mailster itself would consider valid.

Mailster is built for site owners who want to send a lot of email without leaving WordPress, and the underlying data model rewards that ambition. The default admin, however, is a collection of long sortable tables, and the pipeline that lives inside Mailster stays invisible until something breaks. A kanban view changes that.

Editors look at the campaigns board and see exactly how many drafts are waiting and how many newsletters are queued for the weekend. Operators glance at the subscribers board and notice immediately when softbounces are climbing. Support teams revive subscribers after correcting addresses by dragging cards back to subscribed.

By writing changes back through Mailster's own data layer, SleekView Kanban turns the board into a shared working surface without breaking the bounce handling, autoresponders, and audit trail Mailster is known for, while Mailster remains the source of truth for every campaign and every subscriber.