Domain Health Checks: What They See and What They Miss
A health check reads what is public. What that covers, what it cannot tell you, and how fast the answer goes stale.
Ler o guiaVerificador de Saúde de EmailReferência
Guias dasferramentas gratuitas.
A versão longa do que cada ferramenta faz, por que o registro importa e como consertar quando ele quebra. Um guia por ferramenta, sem conta para ler nem para usar.
Verificadores
Email Blocklists and How Delisting Works
Not every listing matters equally. Which lists providers query, how removal works, and why express delisting is a scam.
Ler o guiaVerificador de BlocklistsReading Email Headers
The five header lines that settle a deliverability question, and what a gap in the Received chain is telling you.
Ler o guiaAnalisador de Cabeçalhos de Email
Geradores DNS
SPF Record Setup Guide
What SPF authorizes, the 10 DNS lookup limit, and how to publish a record that does not quietly break.
Ler o guiaGerador de Registro SPFDKIM Record Setup Guide
How DKIM signing works, why it survives forwarding when SPF does not, and how to rotate a key safely.
Ler o guiaGerador de Registro DKIMDMARC Record Setup Guide
What alignment means, why a passing SPF check can still fail DMARC, and the staged path from none to reject.
Ler o guiaGerador de Registro DMARCSPF Flattening: When It Helps and When It Bites
Flattening trades a lookup problem for a maintenance problem. When that trade is worth making, and when pruning is better.
Ler o guiaAchatador de SPF
Ler é o jeito lento de descobrir.
O LitInboxes reverifica cada domínio monitorado a cada 6 horas e avisa quando um desses registros quebra, em vez de você descobrir por um cliente.
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