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New Enterprise services:
SyncML - synchronise your mobile devices with the server. Tasks, appointments, contacts can all be synced.
Mobile web client - for users who want lightweight mobile access for basic email access.
SMS connector - email to SMS, either by using your own phone or an SMS gateway.
Updated webmail client:
Faster - optimised loading which can in some cases halve the log in time
Server side file storage - save your attachments to the server, or upload files to storage
File publishing - users can send URL links to other people to view file storage folders
Rotate your own banners for users, which can be used for advertising or just informational images
Overlay shared calendars, add appointments faster, new skins, and more…
Improved antispam features:
DKIM - help ensure that emails come from who they say they are
Abuse detection - detect and block password attacks automatically
Improved CalDav support
Activity reporting - view recent activity for a mailbox
SMTP TLS outbound sending
POP Retrieval service now supports SSL
Message archiving - save messages as they pass through the server
Log file archiving - compress older log files automatically
Statistics program improvements