check a domain's SPF (Sender Policy Framework) record, löst includes gleich mit auf | include:_spf.example.com = TXT-DNS-record von _spf-subdomain (dig ... txt) | SPF-Test mit gutem Log (redirect...) http://vamsoft.com/support/tools/spf-policy-tester
Android app that warns you about threats like fake base stations (IMSI catchers), user tracking and over-the-air updates | IMSI Detector only: search f-droid repo for "imsi"; works on all android devices even CM
"...a toolset for a wide range of organizations and people that want to improve their safety and security on the Internet. Using Tor can help you anonymize web browsing and publishing, instant messaging, IRC, SSH, ..."