Smart Sending
A per-brand fatigue window (16 hours by default). Flow emails that would land inside it are held and released when it clears; campaigns skip or hold, depending on whether they drip.
Bounces and complaints
- A hard bounce suppresses the address at once. Three soft bounces in 30 days do the same.
- Addresses whose domain can't receive mail are suppressed before the first send.
- Spam complaints suppress the address and count toward the brand's health.
- When complaints or bounces spike, sending pauses on its own and the team is alerted. A clean resume is one click.
Sunset
A contact who has had five or more sends and no engagement in a set number of days stops being mailed. Off by default on a new domain that's still warming.
One-click unsubscribe
Every send carries the List-Unsubscribe headers that Gmail and Apple Mail use for their own Unsubscribe button, plus the link in the footer. The footer link confirms before opting out, because security scanners open every link.
Every link checked
Before a campaign sends, every link a reader could click is fetched. A dead page stops the send.