Troubleshooting

Fix common DKIM errors and configuration issues.

DKIM failures can be caused by DNS misconfiguration, key mismatches, message modification in transit, or canonicalization issues. When DKIM verification fails, receiving servers may flag your messages as suspicious or route them to spam. These guides cover the most common error scenarios — from "body hash did not verify" to missing DNS records — with specific steps to diagnose and resolve each one.

Common DKIM Errors and How to Fix Them

Troubleshoot DKIM failures, signature verification errors, and DNS issues. Learn how to diagnose and fix the most common DKIM problems.

DKIM Body Hash Errors: Causes and Fixes

Learn why DKIM body hash verification fails, what causes 'body hash did not verify' errors, and how to fix them. Covers canonicalization, message modification, and troubleshooting steps.

DKIM Record Not Found: Causes, Diagnosis, and Fixes

Fix the 'DKIM record not found' error. Learn why DKIM DNS lookups fail, how to diagnose missing records, and step-by-step fixes for common causes.

DKIM Record Too Long: How to Fix DNS Length Limits

Fix DKIM records that exceed DNS TXT record length limits. Learn about the 255-character string limit, record splitting, and alternatives for long DKIM keys.

DKIM Signature Not Verified: How to Diagnose and Fix

Diagnose and fix DKIM signature verification failures. Learn why dkim=fail happens, how to read authentication headers, and step-by-step troubleshooting.