Type: boolean
Default: no
Setting this variable will cause Mutt to always attempt to cryptographically sign outgoing messages. This can be overridden by use of the pgp-menu, when signing is not required or encryption is requested as well. IF `` $smime_is_default'' is set, then OpenSSL is used instead to create S/MIME messages and settings can be overridden by use of the smime-menu. (Crypto only)