SPF-PTR-MECHANISM
SPF uses the ptr mechanism
What it means
ptr is deprecated: it is slow, unreliable and some receivers ignore it entirely.
How to fix it
- 1Replace it with ip4/ip6 or include mechanisms.
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.