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Following the disclosures about details on how the United States and other countries are monitoring the world there has been a global discussion about this subject that’s been long overdue. In previous articles I tried to put together what actually has been proven thus far, what that means for society, and what are the implications for

Six months after we released Kolab 3.0, we are very happy to announce the immediate availability of Kolab 3.1 alpha. The most notable new features are CalDAV and CardDAV support. There is also integration with file storage in our web client. It serves files through WebDAV.

We are deeply worried about programs like PRISM and are therefore especially

After a primer on the realities of today’s world, and the totalitarian tendencies that follow from this environment and our behaviour in it, let’s take a look at what this means for professional use of information technology.

Firstly, it should be obvious that when you use the cloud services of a company, you have no secrets from that

1) /etc/postfix/main.cf:
mynetworks erweitert um das interne Netz (und evtl. Subnetze)
- per default war das nur 127.0.0.1

2) Die Default-Limits (20MB) sind für meine Begriffe zu niedrig, also stellen wir höhere Werte (40MB) ein.
hinzufügen zu /etc/postfix/main.cf:
message_size_limit = 41943040
mailbox_size_limit = 41943040

Postfix anschliessend neu