What it does
DKIMValidator receives a test message and reports DKIM, SPF and SpamAssassin analysis based on the received mail.
Send a non-sensitive test message through the actual sending system to an address at dkimvalidator.com, then load its authentication and SpamAssassin results. The service routes mail through Mandrill Inbound and saves it on its server; it says messages are deleted a few hours after receipt. Analysis runs again whenever the result page loads, allowing a saved message to be checked after DNS changes without resending. The provider attempts authoritative DKIM/SPF lookups where possible to reduce caching delay. SpamAssassin uses a vanilla installation with daily rule updates, so its score describes that setup rather than inbox placement at every recipient.
Strengths
- Message-based authentication analysis
Sources
- DKIM, SPF, and Spam Assassin Validator - dkimvalidator.com (Oct 26, 2026)