Understand the three core domain-authentication technologies used to help receiving systems evaluate legitimate email.
Start Free — 1,000 Emails View PricingUse SMTP infrastructure, authentication and monitoring appropriate to your sending requirements.
SPF lets a domain publish which sending systems are authorized to send mail on its behalf.
DKIM adds a cryptographic signature that receiving systems can validate against a public key published in DNS.
DMARC builds on SPF and DKIM and lets domain owners publish policy and reporting instructions.
DMARC evaluation considers alignment between the visible From domain and authenticated identifiers.
Authentication depends on correctly publishing the required DNS records for your sending setup.
Authentication is important, but reputation, recipient consent, list quality, content and engagement also affect outcomes.
Identify the domain you will use in the visible From address.
Configure the SPF, DKIM and DMARC records required for your sending environment.
Confirm records are valid and monitor your sending behavior and reputation over time.
No. SPF is one authentication signal and does not guarantee inbox placement.
Modern sending programs commonly use SPF, DKIM and DMARC together because they address different parts of domain authentication and policy.
The current SMTP-Plans pricing page describes SPF, DKIM and DMARC setup assistance.
Start with 1,000 emails at $0/month or choose a plan that matches your current sending volume.
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