Help ensure your emails
hit the inbox
Stop guessing why your messages end up in spam. Follow this 26-point checklist to achieve technical compliance, enhanced sender reputation, and delivery success.
Use Own Domain
You should always send email from your own domain rather than a free address, as it looks more professional, builds trust, and gives you full control over authentication and reputation.... [more]
rDNS / PTR / HELO
The DNS configuration and HELO / EHLO banner of the sending IP address must be valid and accurate. Invalid or mismatched hostnames may result in message rejection or increased filtering.... [more]
SSL / TLS
Sending servers are required to support current TLS protocols. Non-compliance may result in rejection or negative scoring by recipient systems. Proper TLS configuration not only safeguards message integrity and confidentiality... [more]
SPF
Sender Policy Framework (SPF) defines the authorized IP addresses, hosts, and services permitted to send email for a given domain. Each sending domain must have an accurate SPF record published... [more]
DKIM
DomainKeys Identified Mail (DKIM) provides cryptographic authentication by attaching a digital signature to each outbound message, verifying that it is authorized for the sending domain. A properly implemented DKIM record... [more]
DMARC
Domain-based Message Authentication, Reporting and Conformance (DMARC) is a DNS policy record that leverages SPF and DKIM authentication results. It enables domain owners to define how unauthenticated messages should be... [more]
Dedicated IP
Sending your emails from a dedicated, static IP address is generally recommended once you reach volumes of 50,000 messages per month or more. A dedicated IP lets you build and... [more]