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How to Split a DKIM Record

ID: 00abf453-1000-5024-a894-2cde8a684e6a

STIX ID: report--00abf453-1000-5024-a894-2cde8a684e6a

Feed Name: Security Boulevard

Date Published: 2026-06-05

Date Updated: 2026-06-05

Author: Yunes Tarada

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This article explains that 2048-bit DKIM public keys often exceed the 255-character limit for a single DNS TXT string (per RFC 1035) and provides a step-by-step guide to correctly split and publish DKIM records so DNS resolvers can reassemble them; it covers manual and automated splitting methods, common errors and fixes, provider-specific instructions (AWS, Google Cloud, Cloudflare, cPanel), verification practices, and recommends a client-side DNS record splitter tool.

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