According to Google’s documentation, https://support.google.com/a/bin/answer.py?hl=en&answer=178723
It clearly says Create a TXT record containing this text:
v=spf1 include:_spf.google.com ~all
Why is this not a SPF record?
RFC4408 defines SPF records, but it seems it’s not really used https://tools.ietf.org/html/rfc4408#section-3.1.1
Is that right? Should I create both TXT and SPF ?