Deliverability is a discipline, not a setting
You cannot configure your way into the inbox. Placement is a reputation you build slowly and lose quickly.
Most "our emails go to spam" problems are not bugs. They are the predictable result of treating deliverability as a checkbox instead of a habit.
Reputation is earned at the rate of trust
Mailbox providers decide placement on signals they have watched over time: consistent volume, low complaints, real engagement. A new IP has no history, so it gets no benefit of the doubt. You have to give it one, slowly.
What warming actually is
Warming is sending small, then a little more, to your most engaged contacts first, over weeks, so providers learn that your mail is wanted before you ever send at scale. Skip it and the first big send teaches them the opposite.
- Start with the people who open and click
- Ramp volume on a schedule, not a whim
- Watch complaint and bounce rates like a dashboard, not a quarterly report
The inbox is not a destination you reach. It is a standing you keep.
The quiet work behind the loud numbers
No campaign metric survives a spam folder. Deliverability is the unglamorous half of every result, and the half most teams notice only once it is gone.
Hung Mai is a Germany-based freelance consultant for Digital Operations & Transformation, working remotely with international B2B clients.
