i came across this https://github.com/atech/postal
I think it is a good product and project.
I have not tested it myself, but looking at it, could it be something that we can have integrated inside Nthserver.
Especially the IP rotation option, its settings, etc. on the new cockpit interface.
The use cases are for Someone who would like a way to handle bulk email. Instead of using a separate system like sendgrid, NEthserver with this could serve the purpose.
This will also increase the traction of Nethserve to memeber who need these functions.
Let me know how it looks like.