Hi @BookkeepingBecky
I'll start by stating that I don't actually use any emailing feature in QBO because we mostly deal with large companies & it looks amateurish - so please read the comments below with that in mind.
I also don't use the Advanced package - that may be different (but I doubt it).
To the best of my knowledge, emails sent via QBO are simply sent from a common email address (quickbooks<@>notification.intuit.com) with the sender name Bloggs Widgets Ltd & the reply-to field set to accounts<@>bloggswidgets.com
This is not 'spoofing' as such & should not require any adjustments at domain or server level.
There are many posts on here saying that emails are not being sent or not being received by customers. The most likely cause of this is overactive spam filters and/or bad configuration of Intuit's email servers - bear in mind the volume of email that QBO will be sending out from that one address, even though they use many servers, it make spam filters very twitchy.
The most you (or your customers can do) is check Spam/Junk folders & mark anything in there from QBO as Not Spam or whitelist the quickbooks<@>notification.intuit.com email address.
The problem (I think) is that some of the old help files or USA help files do refer to configuring SPF settings on your email server. This is all nonsense. Anyone directing you to do this is wasting your time!
In fact, there have been many requests for QBO to allow this (it would make QBO emails look as though they came from bloggswidgets.com rather than intuit.com). The requests have been steadfastly ignored because it would open a huge can of worms (every man & his dog would then expect QBO support staff to guide them through the domain settings process).
The only way you can get QBO to email as bloggswidgets.com is if Bloggs Widgets uses Google Apps/Suite/Workspace or whatever they call it this week. Then the Send by GMail feature does seem to work with GSuite addresses (again, I don't actually use this but I did test it while ago).
Hope this helps.
