I can’t comment on Stalwart but if you’re looking for something reliable and easy to install on a VPS I recommend YUNOhost, which is a FOSS server OS that has email out of the box.

Some people have to buy ebooks with DRM to support the author but like to strip it using a Calibre plugin, for various reasons.

I would love to know how you get on with this.

The people who make writefreely are saying that they are working on making image uploads possible for self-hosted instances, not just their own at write.as. Currently if you are self-hosting you can insert an image but it must be hosted elsewhere and inserted via a markdown link.

This looks a lot like Writefreely.

And you would be able to see blog posts in a fediverse feed and subscribe to a blog that way.