Does include:intuit.com need to be included in our SPF record for proper invoice communication with clients?

Thanks for posting in the Community, @svinup.
 

Yes, @svinup. Since the financial tool that allows you to prosper, proud maker of QuickBooks Online is Intuit. Intuit is used to indicate to mail exchanges which hosts are authorized to send mail for a domain.
 

To stay current with our latest news and updates, check it out in our QuickBooks Blog.
 

You can always get back to this post if there's anything else you need to know. I'll be happy to help. Enjoy your weekend!

The reply begins with the word "Yes" but the remainder of the words are complete nonsense which leads me to question whether "Yes" can be trusted.

I see many many questions about how to properly configured your SPF record to allow successful sending of invoice emails with Quickbooks Online but no one from Intuit has been able to provide a workable answer.

For the record, a list of dozens of IP addresses or host names that could change at any time without notice is not a workable answer. A properly formatted SPF record is a workable answer.