Email Authentication Question?

In the Email Authentication - Help section, i can't quite figure out steps number 5 till 9.
Do we have to inser "v=spf1 mx ptr include:sendloop-1.com ~all" in our DNS setings along with our webhosts DNS?
Can you explain more step 9? Not really sure where to insert TXT name and TXT text?

Thanks
Romico
 
happy I’m really confident that SendLoop will be a HIT
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