The README.Debian file of the SOGo package states there is no S/MIME support in the webinterface due to the package being built using GnuTLS instead of openssl while a switch to openssl has been done in commit f2d148cd
Hi! El dl. 17 de 01 de 2022 a les 14:10 +0100, en/na Bernhard Dick va escriure: Oh, thanks for that! It's now fixed in git.