@StefanGries Ok, cool. +1 for the feedback. Interesting input! (maybe for a blog post about alternative mail clients for the mobile..?)
The Best Open Source Email & Collaboration Software
SugarCRM is an Costumer-Relationship-Management system.
Realtime replication of contacts, tasks and calendar items with Zarafa over Z-Merge.
E-mails can be easily archived and connected to SugarCRM objects like Contacts, Accounts, Opportunities etc.
To replicate items and/or archive e-mails, this SugarCRM module has to be installed in SugarCRM: