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Reverse DNS mismatch: Fix SMTP banner errors
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Reverse DNS mismatch: Fix SMTP banner errors


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Fix “reverse DNS does not match SMTP banner” errors by aligning PTR, A records, and server identity to restore trust and reliable email delivery.

First seen on securityboulevard.com

Jump to article: securityboulevard.com/2026/01/reverse-dns-mismatch-fix-smtp-banner-errors/

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