Nun wollte ich auch mal 
Mit der neuen AXIGEN 7.4.2 ist anscheinend das Problem mit dem Speicherplatz gelöst. Gerade bei über 20 Mailboxen hat man häufig das Problem, dass effektiv nur 50-60% des belegten Speichers genutzt werden. Anscheinend hat er den Platz nicht mehr freigegeben.
Super wäre auch eine Integration eines DB-Servers 
Hier die restlichen Änderungen im Release:
Axigen Mail Server
Bug fixes from the previous versions
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- ACTIVESYNC: Last name and nickname were not synced via ActiveSync for domain contacts on IPhone iOS4.
- STORAGE: An "Mbox container with invalid storage set" error used to appear after adding a new message storage with a name alphabetically before the older one.
- HTTP: It is no longer possible to access files outside the WebMail folder, on Axigen for Windows.
- REPORT: SNMP queries no longer cause high CPU usage.
- WEBMAIL-AJAX: Solved a minor XSS vulnerability in the Ajax WebMail interface.
Outlook Connector
Bug fixes from the previous versions
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- The time required for sending emails with attachments larger than 5MB has now been reduced.
- The Chinese name of a task's owner is now properly displayed.
- When reopening a task that contains special chars (Chinese), its subject no longer contains "???" characters.
- Outlook no longer looses the "Show this folder as an email Address Book" option for Domain Contacts folders.
- Appointments can now be forwarded.
Schönen Gruß
SkawoN