Deliverability

Why legitimate email ends up in spam, and how to keep it out of it.

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Why are my emails going to spam?
Spam placement is usually caused by a combination of technical authentication failures, poor sender reputation, blacklist …

All Deliverability articles

Why are my emails going to spam?
Spam placement is usually caused by a combination of technical authentication failures, poor sender reputation, blacklist …
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Related topics

Email Authentication
How SPF, DKIM, and DMARC work together to prove an email really came from your domain.
SPF
Sender Policy Framework: syntax, DNS lookup limits, permerror, and common misconfigurations.
DKIM
DomainKeys Identified Mail: selectors, signing, alignment, and key rotation.
DMARC
DMARC policies, alignment, and aggregate/forensic reporting.
DNS
The DNS record types and concepts email authentication and delivery depend on.
SMTP
SMTP transport, STARTTLS, MTA-STS, and TLS reporting.
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Email Deliverability Checker SPF Checker DMARC Checker MX Checker
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