SPF Record needs adding/changed

Question:
I set up. a wix website and email for my friend. They just got this email back from a client: For the future, Invictus needs to fix their SPF record, as this is causing emails to fail / be blocked. I’m not sure who set up their email / domain but they should be able to help.

I went to my DNS record, went down to add a new record, but I don’t know what I need to put in for host. Is it their respective email addresses or nothing. Also, I don’t know what to put in for value.

Product:
I think Editor

What are you trying to achieve:

I went to my DNS record, went down to add a new record, but I don’t know what I need to put in for host. Is it their respective email addresses or nothing. Also, I don’t know what to put in for value.

What have you already tried:

I went to my DNS record, went down to add a new record, but I don’t know what I need to put in for host. Is it their respective email addresses or nothing. Also, I don’t know what to put in for value.

Additional information:
I need for their emails set up on wix to not be flagged as junk mail so they can get past their clients fire wall.

This link should explain it. You will need to get the records required from the email host.