David HuserMar 8

Where does your commune host email? I did an analysis via DNS records and plotted it on a map:

https://mxmap.ch/

This is an early version, looking for feedback 👀

#digitalsovereignty #dns

MXmap — Email Sovereignty of Swiss Municipalities

Interactive map showing where Swiss municipalities host their official email. DNS analysis of all ~2,100 municipalities, color-coded by provider.

MXmap
Show threadfaebudoMar 8
@davidhuser A lot of them have spf.protection.outlook.com in their SPF which means that there is a high probability that the mailboxes are actually hosted on M365 but they use a (cloud-hosted) mail security gateway like SEPPMail or cleanmail et al.
I just checked some and the map should be a lot more red IMHO.
Show threadDavid HuserMar 8
@faebudo thanks! I updated it to look for these gateways and if the spf record is M365 it‘s flagged as such
Show threadfaebudoMar 8
@davidhuser You could also have a look at the autodiscover.example.net DNS record to get an idea about where mailclients will be connecting to. This would help to identify the infrastructure of municipalities who use gateways to receive as well as send mail.
Show threadDavid Huser
@faebudo thanks a lot for your idea, I could identify some more M365 by the autodiscovery approach (from 992 to 1057 now).
Mar 9 at 9:20pmWeb