Kolab for Open Power

Among a variety of deliberations concerning the security and transparency of a little Kolab thing running anywhere — at home, rented space or hybrid cloud — this post is about the transparency of the hardware layer, and our ongoing efforts to make that so. We have said what, why and how on LWN, at events… Continue reading Kolab for Open Power

What Grey Listing Looks Like

In week 30, on a Friday morning, we applied something called Grey Listing. I told you that about a week’s worth of information was needed to analyse the underlying statistics on a per-domain, per-sender basis — but least I can do is give you a sense of what the statistics are. This will consist of… Continue reading What Grey Listing Looks Like

The 3rd Pillar to Save Your Ass

A controversial topic, to say the least, is what happens when you double-click a message in a Roundcube messages listing, while also having enabled the preview pane. Two things to consider: A regular way to use Roundcube is with a preview pane, A regular way to give reading a message more vertical real estate is… Continue reading The 3rd Pillar to Save Your Ass

Kolab Now: Grey Listing Applied

Aside from other anti-spam measures, we have applied a concept known as grey listing. Here’s a summary of how grey listing works: When an email delivery attempt is made, we know the sending server’s IP address, the sender address, and the recipient address. If this is a previously unseen combination of facts, the delivery attempt… Continue reading Kolab Now: Grey Listing Applied