@morrow without logs this will be hard to track down. can you ask your administrator to open up a support case for this?
The Zarafa - Alfresco plugin offers a possibility of direct communication between Zarafa Webaccess and Alfresco Enterprise Content Management (ECM).
From the Zarafa Webaccess you can easily archive your email attachments to the Alfresco workspace. When writing new emails it's also possible to add an attachment from the Alfresco workspace into the email message.
The integration doesn't require any changes in your Alfesco system and is based on the Zarafa Webaccess plugin system and Alfresco PHP API.