How Carfind.co.za boosted Gmail deliverability and engagement with staggered sending.

Carfind.co.za is one of South Africa’s leading online vehicle marketplaces, and email is a key channel for connecting with its audience. But with the majority of the database made up of Gmail users, a serious problem had set in: emails weren’t always reaching inboxes.

High send volumes in a single window were creating deliverability issues. Gmail’s filtering was reading the burst pattern as low-trust behaviour and quietly steering campaigns to Promotions, or worse. Engagement rates started to slip in the metrics that mattered.

The brief was practical: a smarter approach to ensure the content actually landed where it mattered, front and centre in subscribers’ inboxes, without throttling business-critical send cadence.

We worked closely with the Carfind.co.za team to refine the email strategy on two fronts in parallel.

First, deliverability optimisation through staggered sending. Instead of a single high-volume burst, campaigns were broken into rolling cohorts engineered around Gmail’s reputation signals, engaged segments first, then progressively wider audiences, with throttling tuned to per-provider response patterns.

Second, a value-add content strategy. We shifted the editorial centre of gravity from purely promotional messages to useful, engaging content tailored to the audience, the kind of email a marketplace subscriber would actually want to open. Deliverability and content reinforce each other; weak content erodes the reputation that staggered sending is trying to protect.

Ongoing monitoring of deliverability and engagement metrics drove continuous adjustment. Send windows, cohort sizes and content mix were tuned campaign by campaign, with Gmail-specific signals watched daily for the first eight weeks.

The team paired technical deliverability improvements with stronger content discipline, ensuring campaigns not only reached inboxes, but were welcomed once they arrived. Every send was reviewed against two questions: does it land at Gmail, and does it earn the next open?

The collaboration between Carfind.co.za and Inboxd was deliberately continuous. Deliverability isn’t a one-off fix at scale, it’s an operating discipline, and the cadence of review was set up to keep it that way.

The impact was clear. Inbox placement for Gmail subscribers improved measurably. Engagement increased through more relevant and valuable content. Open and click rates strengthened across campaigns. And critically, performance held consistent even at higher send volumes, the operating goal.

What made it work: a willingness to address the technical side of deliverability head-on, strategic use of staggered sending to navigate Gmail’s filtering, content that provided real value rather than pure promotion, and a continuous refinement loop between the two teams.

Email marketing success at Carfind.co.za came from balancing the technical with the tactical. Staggered sending plus content discipline restored reach to the full database, without compromise.