s/mime export/import in thunderbird

pem-xtract.md

Problem

If thunderbird, doesn't import automatically the sender's S/MIME certificate, then this is how one can "quickly" extract it from a signed message and import it to Thunderbird

Solution

1. On a signed message right click and "save as" an .eml file (e.g. tom.eml)
2. Extract the the certificate with openssl NAME=tom openssl smime -verify -in "$NAME.eml" -signer "$NAME.pem"
3. Add the pem certificate to the "peoples" tab in settings>certificates