SPF record is large enough to be truncated
ATTENTIONWhat it means
At N bytes the response risks truncation on resolvers without EDNS0. A truncated answer means an incomplete record and inconsistent SPF results.
How to fix it
Shorten the record, drop unused mechanisms or flatten includes, to keep the response comfortably under 450 bytes.
Check your own domain
This page describes the condition. To find out whether your domain has it, run the SPF test or the full checkup, which examines every record at once.
Understand it properly
This page covers one condition. For the whole picture, What is SPF, and the ten-lookup limit, or start at the Health Library.
Where this comes from
We judge this against RFC 7208 section 3.4. Every finding on this site cites the specification behind it so you can check the work rather than take our word for it.
Other SPF conditions
SPF_UDP_TRUNCATION_RISK
Every fix on this site is yours to implement. If you would rather someone did it, I take this work directly.