I just noticed that nextcloud includes a community container for stalwart, a competitor to mailcow and mailinabox. I don’t know anything about it but a cursory look at the website looks promising.
Uses Discourse for support, too! 
And an up to date Discourse too, including AI Bot to ask questions (tho it didn’t work for me - maybe I am too new), and an AI Helper bot replying to questions in the forum (example). I also like that their premium product also uses the same discourse for support but with access to a private area. That’s a support model I am considering here.
It appears to not have a webmail interface as well, which I think also helps to simplify the onboarding and daily use of it. Users have to use Thunderbird of another program on their device to access their email/contacts/calendaring, or use nextcloud. I think there is a user account interface for managing passwords and such.
If installing Stalwart on a nextcloud server is a viable option, I’d be happy! I am not in a hurry to change my setup here but would like to hear what others are doing.
Added a topic to sound out the stalwart community about nextcloud. There was no mention of it on the forum so far - I get the feeling the forum itself is quite new.
Experience with Nextcloud and Stalwart? - General - Stalwart Support
I found my way here via the Nextcloud AIO official install docs, which includes this tasty morsel:
Mail server
You can configure one yourself by using either of these four recommended projects: Docker Mailserver, Mailu, Maddy Mail Server, Mailcow or Stalwart. There is now a community container which allows to easily add Stalwart Mail server to AIO: all-in-one/community-containers/stalwart at main · nextcloud/all-in-one · GitHub
I currently am using mailcow and nextcloud together which works fine, but I was curious to see what people here think of nextcloud as a pairing with stalwart, and also what experiences people might have had using the community container that adds Stalwart to a nextcloud-aio server. It’s community contributed so not officially supported by nextcloud.
At first blush, I am attracted. Mailcow is great but it also includes SOGo which is not bad at all but brings a new interface and paradigm. Nextcloud is a fairly self contained platform with features that are tightly integrated with each other, so I am not sure SOGo is needed. Meanwhile, being able to simply add a container to the nextcloud install is also appealing.
When I get a chance I will give this a spin, and will be happy to share my experiences here. But in the meantime if anyone has any insights/thoughts I’d be happy to hear them.
I’m excited to discover Stalwart and this Discourse community! Until recently I worked at Discourse as product manager so of course I am a big fan, and happy to see some features I worked on recently on display here.
