The bundled reader is based on HiraokaHyperTools/msgreader (Apache-2.0), with a replacement CFB reader. The EML serializer is implemented in this project. License notices are distributed with the source.
MSG Converter
Proprietary Software — All Rights Reserved
Copyright (c) 2026. All rights reserved.
MSG Converter is proprietary software and is not an open-source project.
This notice applies to the original project code and documentation.
No public license to use, copy, modify, publish, distribute, sublicense, or
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Any such permission must be obtained separately from the applicable copyright
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MSG Reader (modified)
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Copyright 2019 HIRAOKA HYPERS TOOLS, Inc.
Copyright 2016 Yury Karpovich
Licensed under the Apache License, Version 2.0 (the "License");
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fflate
MIT License
Copyright (c) 2026 Arjun Barrett
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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iconv-lite
Copyright (c) 2011 Alexander Shtuchkin
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buffer
The MIT License (MIT)
Copyright (c) Feross Aboukhadijeh, and other contributors.
Permission is hereby granted, free of charge, to any person obtaining a copy
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base64-js
The MIT License (MIT)
Copyright (c) 2014 Jameson Little
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ieee754
Copyright 2008 Fair Oaks Labs, Inc.
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safe-buffer
The MIT License (MIT)
Copyright (c) Feross Aboukhadijeh
Permission is hereby granted, free of charge, to any person obtaining a copy
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safer-buffer
MIT License
Copyright (c) 2018 Nikita Skovoroda <[email protected]>
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string_decoder
Node.js is licensed for use as follows:
"""
Copyright Node.js contributors. All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE.
"""
This license applies to parts of Node.js originating from the
https://github.com/joyent/node repository:
"""
Copyright Joyent, Inc. and other Node contributors. All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
IN THE SOFTWARE.
"""