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.
Authentication
#5
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. In addition, ensure that reverse DNS (PTR) records are in place and that SPF, DKIM, and DMARC records are correctly published. These measures are essential for authentication and for maintaining strong deliverability.
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