DKIM key is in testing mode (t=y)

Check id: dkim.testing_flag · fix effort: low

What it means

Your signing key is flagged as testing, which tells receivers not to take its results seriously. Flip it to production mode.

The technical detail

The t=y flag (RFC 6376 3.6.1) signals test mode. Some verifiers ignore signatures from testing keys.

How to fix it

  1. Remove t=y from the key record once signing is confirmed working.

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