Who runs the official email of your municipality, and how well is it protected against fake senders? Interactive maps of ~15,300 municipalities in Germany, Austria, and Switzerland, based on public DNS records and network signals. They accompany our peer-reviewed SecAssure 2026 paper.
Which provider handles each municipality's official email? Classified by jurisdiction: US cloud (Microsoft, Google, AWS), domestic, or foreign.
Open map →How well are municipality email domains protected against spoofing? Based on SPF and DMARC configuration.
Open map →Mario Bischof, David Huser, Alexej Ochsner, Ronald Petrlic, Edy Portmann
Computer Security. ESORICS 2026 International Workshops (SecAssure 2026), LNCS, Springer, to appear
@inproceedings{bischof2026email,
author = {Bischof, Mario and Huser, David and Ochsner, Alexej and Petrlic, Ronald and Portmann, Edy},
title = {Email Provider Dependencies and Email Security in Municipalities Across {Germany}, {Austria}, and {Switzerland}},
booktitle = {Computer Security. ESORICS 2026 International Workshops (SecAssure 2026)},
series = {Lecture Notes in Computer Science},
publisher = {Springer Nature Switzerland},
year = {2026},
note = {to appear}
}
Accepted manuscript. The Version of Record will be available from Springer once published; use is subject to Springer Nature's Accepted Manuscript terms.
Maps for other countries, derived from the predecessor mxmap.ch.
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