This crate allows you to deconstruct an existing SPF record that might be retrieved with a dns query of type TXT.
With 0.2.0. You now have the ability to create SPF records programmatically. Check the Examples directory for sample code.
See Example Code
Lookup and deconstruct Spf record.
To see a list of available examples.
This crate is not intended to provide syntax validation.
If you are looking to validate your SPF record. I would suggest you use one of the following.
I am sure there are many others that could be found.