The Mutt E-Mail Client : Reference : Configuration variables : smime_sign_opaque_command
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## 6.3.162. smime_sign_opaque_command

Type: string
Default: ""

This command is used to created S/MIME signatures of type applicatipn/x-pkcs7-signature, which can only be handled by mail clients supporting the S/MIME extension

The Mutt E-Mail Client : Reference : Configuration variables : smime_sign_opaque_command
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