Email security
DKIM key at least 2048-bit
SPF, DMARC, DKIM, MTA-STS: protection against spoofed mail in your name.
Why it matters
Short DKIM keys can be cracked, letting an attacker sign mail as your domain.
How to fix it
Quick fix · under 1 hour- Generate a 2048-bit key in your mail provider.
- Publish it under a new selector, switch signing, then remove the old key.
Test this now, free: SPF, DMARC & DKIM checker - no sign-up.
How we test it
The check runs from the public internet as part of every scan, read-only and without touching your data. If it fails, your report shows the evidence that proves it - the record, header, file or banner we observed - together with the fix above, tailored to the issue we found.
Does your domain pass this check?
Run all 97 checks in about a minute. Your first scan is free, with the complete fix for your most urgent finding.
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