配置文件完全相同的在两台机器上，因为它们是通过云驱动器共享的。
从 Ubuntu 机器发送给我自己的测试消息“可以”在 macOS 机器上通过 mutt 解密和阅读，没有任何问题。此外，两台机器向自己发送消息都可以正常工作。
问题在于解密 Ubuntu 机器上从 macOS 发送的消息。
Ubuntu 机器有一个 GnugPG 版本，它比 macOS 机器稍微旧一些（2 年），但两者都高于 2.1 版本，与以前的版本相比有一些变化。
我没有在配置文件中使用 gpgme 或其 gpg-agent，因为我遇到了以下问题：a) 默认使用 s/mime 而不是 PGP，b) 不接受自签名 X509 证书。
纯 PGP 配置
MUTT 错误消息
在 mutt 的消息索引中选择一条消息时，我得到以下信息：
Invoking PGP ...
Could not decrypt PGP message
Could not copy message
问题
- 这是 GnuPG 向后兼容性问题吗？
- 这个问题可以解决吗？如何解决？
版本详细信息
macOS:
$ gpg --version
gpg (GnuPG) 2.3.4
libgcrypt 1.10.0
Copyright (C) 2021 Free Software Foundation, Inc.
License GNU GPL-3.0-or-later <https://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Home: /Users/tonybarganski/.gnupg
Supported algorithms:
Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA
Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
CAMELLIA128, CAMELLIA192, CAMELLIA256
AEAD: EAX, OCB
Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB, BZIP2
---
Mutt 2.2.1 (2022-02-19)
Copyright (C) 1996-2022 Michael R. Elkins and others.
Compile options:
-DOMAIN
+DEBUG
-HOMESPOOL +USE_SETGID +USE_DOTLOCK +DL_STANDALONE +USE_FCNTL -USE_FLOCK
+USE_POP +USE_IMAP +USE_SMTP
+USE_SSL_OPENSSL -USE_SSL_GNUTLS +USE_SASL -USE_GSASL +USE_GSS +HAVE_GETADDRINFO
+HAVE_REGCOMP -USE_GNU_REGEX
+HAVE_COLOR +HAVE_START_COLOR +HAVE_TYPEAHEAD +HAVE_BKGDSET
+HAVE_CURS_SET +HAVE_META +HAVE_RESIZETERM +HAVE_FUTIMENS
+CRYPT_BACKEND_CLASSIC_PGP +CRYPT_BACKEND_CLASSIC_SMIME +CRYPT_BACKEND_GPGME
-EXACT_ADDRESS -SUN_ATTACHMENT
+ENABLE_NLS -LOCALES_HACK +HAVE_WC_FUNCS +HAVE_LANGINFO_CODESET +HAVE_LANGINFO_YESEXPR
+HAVE_ICONV -ICONV_NONTRANS -HAVE_LIBIDN -HAVE_LIBIDN2 +HAVE_GETSID +USE_HCACHE
+USE_SIDEBAR -USE_COMPRESSED -USE_INOTIFY
-ISPELL
Ubuntu20.04
gpg (GnuPG) 2.2.19
libgcrypt 1.8.5
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Home: /home/tony/.gnupg
Supported algorithms:
Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA
Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
CAMELLIA128, CAMELLIA192, CAMELLIA256
Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB, BZIP2
---
Mutt 1.13.2 (2019-12-18)
Copyright (C) 1996-2016 Michael R. Elkins and others.
Mutt comes with ABSOLUTELY NO WARRANTY; for details type `mutt -vv'.
Mutt is free software, and you are welcome to redistribute it
under certain conditions; type `mutt -vv' for details.
System: Linux 5.13.0-35-generic (x86_64)
ncurses: ncurses 6.2.20200212 (compiled with 6.2)
libidn: 1.33 (compiled with 1.33)
hcache backend: tokyocabinet 1.4.48
Compiler:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.3.0-17ubuntu1~20.04' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable- languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux- gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable- nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable- vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch -- disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload- targets=nvptx-none=/build/gcc-9-HskZEa/gcc-9-9.3.0/debian/tmp-nvptx/usr,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux- gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)