O que é um Registro SPF?
SPF (Sender Policy Framework) is a DNS-based email authentication protocol that specifies which mail servers are authorized to send email on behalf of your domain. It helps prevent spammers from sending messages with forged "From" addresses using your domain name.
Como Funciona
An SPF record is a TXT record in your DNS zone that lists authorized IP addresses and mail servers. When a receiving mail server gets an email from your domain, it checks the SPF record to verify the sending server is authorized. If the check fails, the email may be rejected or marked as spam.
Por Que Importa
Without SPF, anyone can send email pretending to be from your domain. This enables phishing attacks and damages your domain reputation. SPF is a foundational requirement for email deliverability and is part of the DMARC framework.
Problemas Comuns
- SPF record syntax errors causing permerror
- Exceeding the 10 DNS lookup limit
- Missing authorized senders (e.g., third-party services)
- Multiple SPF records on the same domain
- Overly permissive mechanisms like +all