Record Length
Checks the length of the SPF record to make sure it isn't too long.
A TXT record by definition must be a string shorter than 256 characters. It is possible to have a longer record by concatenating two or more strings together, but this shouldn't be necessary. If your SPF record is longer than 450 characters this test will issue a warning suggesting that you remove unused mechanisms.
Ready to validate your website for this test and 100+ others?