There are almost half a dozen new opensource webmail systems that you can host yourself now, after a decade of little development. One of them is so good that after testing it for my work, I've grown to use it almost every day privately. Several of their developers attend FOSDEM this year and may talk about their software in depth, this talk covers them as a group. It's mostly for an audience that (may) want to self-host (again).

What sets the new webmail systems apart from the old ones, how do they compare to Google's and Microsoft's polished offerings, how do they compare to each other? I'll talk about all of that, and since I am a standards wonk there is a risk that I may digress into how well or badly they use the standards.