[alpine
,
mail
,
linux
,
s/mime
,
smime]
Alpine - configure S/MIME
Copy your public key and your private key to the directories ~/.alpine-smime/public and ~/.alpine-smime/private respectively.
./public/your@mailaddress.com.crt ./private/your@mailaddress.com.key
Go to S/MIME configuration m → s → m
Enable sign by default