Who on Earth think onboadrding mail is a good idea? It's junk mail and nobody reads it. Never place there any important information - most users completely ignore them.
The only mail I expect is email address confirmation.
If I buy a product it is not usefull to me. If I add a user in my org they are golden when done right.
It becomes one less thing i need to demo and train a new hire right now before they can be productive.