2022 03 19 + published on https://github.com/InstallAndUse/Daily /A

assumed that evolution is installed and working properly

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openpgp

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evolution, edit, preferences, mail accounts, select account, edit (double click) security, Pretty Good Privacy (OpenPGP) OpenPGP Key Id: (insert fingerprint here, without spaces) select signing algorithm: default

recipient has several email addresses in keypair,

evolution refuses to send

set keypair trust

gpg2 --edit-key BB8F40F041619xxxx47754xxxx8A11 trust

5 = I trust ultimately

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p12 MIME

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evolution, edit, preferences, certificates, your certificates, import (pass), mail accounts, select account, edit (double click) security, Secure MIME, signing certificate, [select], select cert, [ok] encryption certificate, [select], select cert, [ok] select signing algorithm: default

Evolution issue: Could not create message. you may need to select different mail options. Detailed error: Peer's Certificate issuer is not recognized. (-8179) - Cannot add SMIMEEncKeyPrefs attribute

https://askubuntu.com/questions/36300/error-when-sending-signed-mail-in-evolution edit, [x] trust this ca to identify email users

if you did not found your issuer in list, list certs

certutil -d sql:$HOME/.pki/nssdb -L

find your certs nickname, set as trusted

certutil -d sql:$HOME/.pki/nssdb -M -n "(nickname)" -t Pu,Pu,Pu

verify