If you want to get in contact with me about about Free Software (also called Open Source Software) topics, as most of you probably want, then please use the ways listed on my FSFE about page; there you also find information about encrypted communication.
As the updates here on my blog are irregular I encourage you to subscribe using the RSS feed (a technology I encourage you to look into, in case you do not know about it).
One of the best ways to stay up to date with the software freedom topics I care about is to subscribe to the FSFE's e-mail updates where our experts and myself inform you about current news, events, activities, and how you can contribute.
I am also co-hosting the FSFE's Software Freedom podcast, so if you subscribe to the podcast you will also hear from me around every two months.
Beside that you might find some updates on:
Please do not use those services to message me as most likely will not see messages there.
For questions specific to the operation of the personal website k7r.eu of Matthias Kirschner please use: firstname.lastname@example.org.
As required by German law, here the postal address:Matthias Kirschner