For A) I believe that is what https://mailinabox.email/ is trying to achieve

martinmunk · on July 26, 2020

In search of self hosting email I tried out both MailInABox and Mailcow. MailInABox wanted to control DNS records which was a no-go. The primary driver behind the project seems to have arrogant attitude towards having users do DNS records themselves. Mailcow seemed nice but was guzzling up ram for seemingly no good reason. Finally tried out Mailu a few days ago which seems to work nice, albeit with limited testing.

mustardo · on July 27, 2020

Mail in a box suggests being the DNS server in an attempt to be more user friendly, there are a lot of DNS records to setup for mail. How ever external DNS is supported (see "System status & DNS" in https://mailinabox.email/guide.html)

mawalu · on July 27, 2020

The RAM intensive elements of mailcow are search and clamav, you can disable them both if you don't need them

codethief · on July 26, 2020

If only it didn't come with so many things (Roundcube, NextCloud) I don't need.

gertrunde · on July 27, 2020

I thought the same thing, but then I ended up using roundcube as my default non-mobile device mail client. And I just ignore the nextcloud bit.

(This is admittedly a very small deployment for two users and 3-4 domains on a $5/month VPS).

A lot of the other stuff I evaluated at the time (3-4 years ago) came with yet more stuff.