DKIM-WEAK-KEY
DKIM key shorter than 1024 bits
What it means
Short keys can be factored; Google and others reject signatures under 1024 bits.
How to fix it
- 1Generate a 2048-bit key, publish it under a new selector, switch signing, then remove the old key.
Re-check after the change
DNS changes can take up to the record's TTL to be seen; use Re-run on the result page to bypass our 10-minute cache.