Is this another closed source solution with a community edition? I am very wary of those having worked at VMware when they bought Zimbra and seen how ugly things can get.

Which begs the question, is there anyone comparing those solutions? Off the top of my head: zimbra, carbonio, openexchange, zarafa, citadel. 
And do I dare add Lotus and GroupWise? :)

On Sat, Jan 10, 2026 at 21:17 Ron via Talk <talk@lists.gtalug.org> wrote:

Has anyone on this list got hands-on experience with Stalwart email
server software?

https://stalw.art/


It's an entire email stack written in Rust. Replaces Postfix, Dovecot,
OpenDKIM, fail-2-ban, Mailman (has a built-in mailing list, no need for
the nightmare that is MM anymore), supports CalDAV, CardDAV, WebDAV,
JMAP, IMAP, POP3, anti-spam, Sieve, etc.


Web site's really fast, even the management console run from inside a
Docker container is fast, well designed, well laid out.


It's appealing to shed the 1,000+ options for Postfix, even more for
Dovecot, plus all the ancillary tools required to run email.

On the other hand, Postfix & Dovecot are what I know - and learned at
great cost (time & frustration), and are where the jobs are.



What brought me to this is, looking for a way to offer contacts &
calendar syncing along with email hosting.

NextCloud was my first choice, but trying to get the AIO (All In One) to
support multiple domains in one instance is not well supported as best I
can tell.


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