At Deliverability Summit 2026 in Barcelona, Syed Alam of Postmastery walked through a dataset where roughly 18% of addresses suppressed under a standard hard/soft model were still valid recipients. They had been removed because a 5xx code looked terminal, or because a 4xx kept repeating. Both assumptions were wrong, and both were costing senders revenue […]

At Deliverability Summit 2026 in Barcelona this April, David Finger of Seznam stated it plainly: “p=none provides no real protection.” That single sentence reframed how the room thought about DMARC. For years, p=none was treated as a safe monitoring stance. In 2026, it is a reputation liability. Mailbox providers are scoring domains on enforcement posture, […]

Why ESP Migration Is One of the Riskiest Moves in Email Operations Switching your email service provider sounds straightforward on paper. You export your lists, configure your DNS records, and start sending from a new platform. In practice, high-volume senders regularly lose 20 to 40 percent of their deliverability gains during migrations gone wrong. Having […]

Qué aprenderás en este artículo Los tres tipos de viaje del cliente que todo programa de email debe cubrir, y por qué la mayoría solo cubre uno Por qué la reactivación funciona diferente del engagement, y qué significa “novedad” en la práctica La única métrica que te dice si tu base de datos activa crece […]

What you will take away from this The three customer journey types every email program must serve, and why most programs only serve one Why reactivation works differently from engagement, and what “novelty” actually means in practice The single metric that tells you if your active database is growing or quietly shrinking Why reply rate […]

Most Mautic implementations fail before the first campaign sends. They fail during infrastructure planning, when someone assumes “open-source” means “simple.” This Mautic implementation guide exists because we watched teams repeat the same structural mistakes across industries, geographies, and volume tiers. Fifty deployments later, the patterns are clear. The platform is capable. The problem is almost […]