Kolab Now Beta Program: An Update

Now that we’ve launched our Kolab Now Beta Program, I get to tell you more about what it is we learn from it. Before we start, the features that are a part of this program are not supported. You’re welcome to provide us with feedback on the Kolab Hub Beta Program forum, but feedback does… Continue reading Kolab Now Beta Program: An Update

Introducing the Kolab Now Beta Program

I’m pleased to be able and allowed to introduce you to the Kolab Now Beta Program, which my colleagues and myself can use to deploy newer versions of software sooner, faster and with less strict guarantees of availability and stability (i.e. the concept of a “service window” does not apply). The first feature to be… Continue reading Introducing the Kolab Now Beta Program


Close your eyes and imagine a world in which a user visits a website. This website may be encrypted, and when it is, the SSL certificate used must somehow be validated. Traditionally, SSL certificates are issued by third parties that have their certificate authorities included in browsers and operating system’s bundles. This way, whichever SSL… Continue reading HPKP or DANE?

Kolab’s Authentication Cache

Soon after the release of Kolab 3 — the original, 2012 edition– the SASL Authentication daemon that Kolab provides to facilitate distributing LDAP hierarchies over multiple root DNs or even separate LDAP servers has assisted the speed of authentication with a cache. Not the kind of cache you may be thinking about, though. The information… Continue reading Kolab’s Authentication Cache

rcode0: the absolute best of the bunch

We’ve run several DNS zones for Kolab Now, using an in-house hidden nameserver topology — in order to protect the keys used to sign DNSSEC zones, both the hidden topology as well as keeping as much of it in-house as possible, have been absolute musts. More recently, we received a certain type of threat, causing… Continue reading rcode0: the absolute best of the bunch