Comment by nine_k

1 day ago

In short: 30k users, 40k mailboxes, 100M emails and calendar entries migrated. The client is Thunderbird. The server / web side is handled by Open-Xchange, hosted by a local provider with the same name (AFAICT), which also offers commercial licensing for the otherwise-AGPL suite.

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nine_k

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Sauerlaender  17 hours ago

The service gets operated by Dataport AöR. Dataport is the primary service provider / datacenter of some german federal states and owned by them.

They client is mainly Open-Xchange AppSuite Web UI, some people use Thunderbird on top. There are also thousands of mobile devices, syncing via IMAP, SMTP, CalDAV, CardDAV.

yobbo  1 day ago

Open-Xchange is most likely a more effective name for the combination Cyrus IMAP, postfix, etc.

  • cycomanic  1 day ago

    Instead of guessing it's an easy lookup. OpenXchange is an app suite that's been around for >20 years. It's not some random ad hoc combination of software.

    The email server underneath is dovecot btw.