Validates DKIM signatures for email authentication
Validates DKIM (DomainKeys Identified Mail) signatures for email authentication and integrity.
This checker validates DKIM (DomainKeys Identified Mail) signatures for email authentication and integrity. It checks:
DKIM Record Presence: Verifies that DKIM TXT records exist for common selectors
Valid DKIM Syntax: Confirms records follow the correct DKIM format
Selector Configuration: Checks for common DKIM selectors (default, google, k1, selector1, selector2)
Record Format: Validates that records start with v=DKIM1 or contain p= parameter
The checker performs DNS TXT record lookups for DKIM selectors and validates DKIM record syntax. It checks multiple common selectors and provides detailed results for each.
| Status | Condition | Test Logic | Description |
|---|---|---|---|
| SUCCESS | DKIM properly configured | - DKIM records exist for all checked selectors - Records start with v=DKIM1 or contain p= parameter - Record syntax is correct | Domain has properly configured DKIM for email authentication |
| WARNING | DKIM partially configured | - DKIM records exist for some selectors but not all - Some selectors are missing or invalid - Mixed results across different selectors | DKIM is partially configured; some selectors are missing |
| FAIL | DKIM completely missing | - No DKIM records found for any selectors - All checked selectors are missing - No valid DKIM configuration found | Domain lacks any DKIM configuration |
| ERROR | Technical failure | - DNS lookup failed - Network connectivity issues - Invalid domain format | Technical error occurred during DKIM validation |
If DKIM is missing or misconfigured, the following risks apply:
Email Authentication Failure: Emails may fail authentication checks
Email Deliverability Issues: Legitimate emails may be rejected or marked as spam
Email Spoofing: Attackers may send emails claiming to be from your domain
Integrity Issues: Email content may be tampered with during transmission
Compliance Violations: Some industries require DKIM for email security
Reputation Damage: Your domain may be blacklisted by email providers
Business Communication Risk: Important emails may not reach recipients
Customer Trust Loss: Recipients may lose confidence in emails from your domain
Add this checker to your monitoring setup and start identifying issues on your websites today.