SUCCESS STORY
PropellerAds: Deliverability restored and clicks boosted by 92% with Brevo
By migrating to Brevo, advertising platform PropellerAds restored its domain reputation, doubling its open rate, before increasing clicks by 92% using A/B testing.
About PropellerAds
Founded in 2011, PropellerAds is a multisource advertising platform providing access to unique traffic sources and AI-based ad-serving and optimization tools for media buyers, agencies, brands, and affiliate marketers. Today, PropellerAds delivers over 15 billion ad impressions a day across 195+ GEOs. With a database of hundreds of thousands of contacts, email communication is a critical strategic pillar to engage, retain, and reactivate their international audience.
The challenge
Restoring domain reputation and unlocking engagement
Following their migration to a new ESP, PropellerAds' domain reputation reset to 'Low' in Google Postmaster Tools — a common and expected outcome when switching sending infrastructure.In January 2026, their open rates were dangerously stagnant (around 5 to 6%). The team's objective was twofold: urgently restore optimal deliverability to regain their audience's attention, and then find the perfect email structure to drastically boost engagement and clicks.
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Rebuilding reputation and discovering the perfect email formula
To address these challenges, PropellerAds relied on the Brevo platform and its strategic support:
- Deliverability restoration: PropellerAds rigorously followed Brevo's deliverability recommendations. For 1.5 months, they sent campaigns only to contacts who had opened within a defined recent period, gradually widening that window as engagement improved. This strict sending hygiene strategy paid off: their reputation on Google Postmaster Tools went from "Low" to "High", and their open rates more than doubled
- Optimization via A/B Testing: To skyrocket engagement, the team deployed Brevo's A/B Testing tool. They ran 5 rigorous tests comparing their usual emails to much shorter formats (a strong hook, minimalist text, a single CTA). The short format won every single test, generating an average click increase of 92%.
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