The Mutt E-Mail Client : Reference : Configuration variables : pgp_retainable_sigs
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## 6.3.135. pgp_retainable_sigs

Type: boolean
Default: no

If set, signed and encrypted messages will consist of nested multipart/signed and multipart/encrypted body parts.

This is useful for applications like encrypted and signed mailing lists, where the outer layer (multipart/encrypted) can be easily removed, while the inner multipart/signed part is retained. (PGP only)

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