Why does DKIM key length matter?

Longer keys are harder to break cryptographically and improve trust in your signed messages.

Is 1024-bit DKIM still allowed?

Some providers still accept it, but 2048-bit is strongly recommended for modern security standards.

Generate a new 2048-bit key pair, publish a new selector in DNS, update your sender, then deprecate the old selector.

Not if done carefully. Keep old and new selectors active during rollout to avoid signature failures.

Send a test email and confirm DKIM pass in headers, then re-check the selector with a DKIM validation tool.

Modern email security requires at least 2048-bit DKIM keys. This tool verifies your current key strength and suggests upgrades if needed.

AI-written reply suggestions

Automated follow-up sequences

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Unlimited connected accounts

Modern email security requires at least 2048-bit DKIM keys. This tool verifies your current key strength and suggests upgrades if needed.

AI-written reply suggestions

Automated follow-up sequences

Campaign open & click tracking

Unlimited connected accounts