[CentOS] Which is better? Microsoft Exchange 2016 or Linux-based SMTP Servers?

[S P Arif Sahari Wibowo]

On 2018-07-18, 15:05, Valeri Galtsev wrote:
> No, owncloud/nextcloud don't work with IMAP as far as I know. 
> Mail server is separate issue.

Depend on what you define as "work with IMAP", Nextcloud does 
not come with IMAP server, but installing an IMAP server on the 
side of Nextcloud/Owncloud using the same storage probably not 
that difficult. Furthermore, Nextcloud can have IMAP as 
authentication backend, and also have extension that allow 
accessing IMAP from inside Nextcloud interface, make it easier 
to give impression of integration to users.

> significantly increases the chance one day openly available 
> incarnation of each may become no longer available for us, and 
> I will have to find replacement in a rush and find the way to 
> migrate to it, and the more sophisticated the thing is, the 
> trickier the migration will be.

That said, if the code actually FOSS, then anybody who is 
willing can fork the last FOSS code and continue developing it, 
and we have many of those, like Illumos out of Open Solaris, 
LibreOffice out of OpenOffice, MariaDB out of MySQL, Bareos out 
of Bacula, etc.

> Nextcloud is fork of owncloud, and to my regret nextcloud 
> doesn't work with postgresql,

Not true, Nextcloud can have PostgreSQL as database backend: 
https://docs.nextcloud.com/server/12/admin_manual/configuration_database/linux_database_configuration.html

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