Relicense under the Unlicense (instead of CC0)

I didn't do a comprehensive review of contributions from others but they have generally been fairly minimal.

See #113 for rationale.

CONTRIBUTING.md

@@ -1,7 +1,7 @@
-## Public domain
+This project is in the public domain. Copyright and related
+rights in the work are waived through the [LICENSE](LICENSE)
+file in this directory.
 
-This project is in the public domain. Copyright and related rights in the work worldwide are waived through the [CC0 1.0 Universal public domain dedication][CC0]. See the LICENSE file in this directory.
-
-All contributions to this project must be released under the same CC0 wavier. By submitting a pull request or patch, you are agreeing to comply with this waiver of copyright interest.
-
-[CC0]: http://creativecommons.org/publicdomain/zero/1.0/
+All contributions to this project must be released under the
+same terms. By submitting a pull request or patch, you are
+agreeing to comply with this.

LICENSE

@@ -1,121 +1,27 @@
-Creative Commons Legal Code
-
-CC0 1.0 Universal
-
-    CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
-    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
-    ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS
-    INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES
-    REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS
-    PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM
-    THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
-    HEREUNDER.
-
-Statement of Purpose
-
-The laws of most jurisdictions throughout the world automatically confer
-exclusive Copyright and Related Rights (defined below) upon the creator
-and subsequent owner(s) (each and all, an "owner") of an original work of
-authorship and/or a database (each, a "Work").
-
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-These owners may contribute to the Commons to promote the ideal of a free
-culture and the further production of creative, cultural and scientific
-works, or to gain reputation or greater distribution for their Work in
-part through the use and efforts of others.
-
-For these and/or other purposes and motivations, and without any
-expectation of additional consideration or compensation, the person
-associating CC0 with a Work (the "Affirmer"), to the extent that he or she
-is an owner of Copyright and Related Rights in the Work, voluntarily
-elects to apply CC0 to the Work and publicly distribute the Work under its
-terms, with knowledge of his or her Copyright and Related Rights in the
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-
-1. Copyright and Related Rights. A Work made available under CC0 may be
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- vi. database rights (such as those arising under Directive 96/9/EC of the
-     European Parliament and of the Council of 11 March 1996 on the legal
-     protection of databases, and under any national implementation
-     thereof, including any amended or successor version of such
-     directive); and
-vii. other similar, equivalent or corresponding rights throughout the
-     world based on applicable law or treaty, and any national
-     implementations thereof.
-
-2. Waiver. To the greatest extent permitted by, but not in contravention
-of, applicable law, Affirmer hereby overtly, fully, permanently,
-irrevocably and unconditionally waives, abandons, and surrenders all of
-Affirmer's Copyright and Related Rights and associated claims and causes
-of action, whether now known or unknown (including existing as well as
-future claims and causes of action), in the Work (i) in all territories
-worldwide, (ii) for the maximum duration provided by applicable law or
-treaty (including future time extensions), (iii) in any current or future
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-including without limitation commercial, advertising or promotional
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-member of the public at large and to the detriment of Affirmer's heirs and
-successors, fully intending that such Waiver shall not be subject to
-revocation, rescission, cancellation, termination, or any other legal or
-equitable action to disrupt the quiet enjoyment of the Work by the public
-as contemplated by Affirmer's express Statement of Purpose.
-
-3. Public License Fallback. Should any part of the Waiver for any reason
-be judged legally invalid or ineffective under applicable law, then the
-Waiver shall be preserved to the maximum extent permitted taking into
-account Affirmer's express Statement of Purpose. In addition, to the
-extent the Waiver is so judged Affirmer hereby grants to each affected
-person a royalty-free, non transferable, non sublicensable, non exclusive,
-irrevocable and unconditional license to exercise Affirmer's Copyright and
-Related Rights in the Work (i) in all territories worldwide, (ii) for the
-maximum duration provided by applicable law or treaty (including future
-time extensions), (iii) in any current or future medium and for any number
-of copies, and (iv) for any purpose whatsoever, including without
-limitation commercial, advertising or promotional purposes (the
-"License"). The License shall be deemed effective as of the date CC0 was
-applied by Affirmer to the Work. Should any part of the License for any
-reason be judged legally invalid or ineffective under applicable law, such
-partial invalidity or ineffectiveness shall not invalidate the remainder
-of the License, and in such case Affirmer hereby affirms that he or she
-will not (i) exercise any of his or her remaining Copyright and Related
-Rights in the Work or (ii) assert any associated claims and causes of
-action with respect to the Work, in either case contrary to Affirmer's
-express Statement of Purpose.
-
-4. Limitations and Disclaimers.
-
- a. No trademark or patent rights held by Affirmer are waived, abandoned,
-    surrendered, licensed or otherwise affected by this document.
- b. Affirmer offers the Work as-is and makes no representations or
-    warranties of any kind concerning the Work, express, implied,
-    statutory or otherwise, including without limitation warranties of
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- c. Affirmer disclaims responsibility for clearing rights of other persons
-    that may apply to the Work or any use thereof, including without
-    limitation any person's Copyright and Related Rights in the Work.
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-    Work.
- d. Affirmer understands and acknowledges that Creative Commons is not a
-    party to this document and has no duty or obligation with respect to
-    this CC0 or use of the Work.
+This is free and unencumbered software released into the public
+domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a
+compiled binary, for any purpose, commercial or non-commercial,
+and by any means.
+
+In jurisdictions that recognize copyright laws, the author or
+authors of this software dedicate any and all copyright
+interest in the software to the public domain. We make this
+dedication for the benefit of the public at large and to the
+detriment of our heirs and successors. We intend this
+dedication to be an overt act of relinquishment in perpetuity
+of all present and future rights to this software under
+copyright law.
+
+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 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.
+
+For more information, please refer to <https://unlicense.org/>

README.md

@@ -423,7 +423,6 @@ or likely to cause trouble:
   No one uses these forms anymore, and I can't think of any reason why anyone
   using this library would need to accept them.
 
-
 Testing
 -------
 
@@ -455,3 +454,8 @@ git tag v$(cat email_validator/version.py  | sed "s/.* = //" | sed 's/"//g')
 git push --tags
 ./release_to_pypi.sh
 ```
+
+License
+-------
+
+This project is free of any copyright restrictions per the [Unlicense](https://unlicense.org/). (Prior to Feb. 4, 2024, the project was made available under the terms of the [CC0 1.0 Universal public domain dedication](http://creativecommons.org/publicdomain/zero/1.0/).) See [LICENSE](LICENSE) and [CONTRIBUTING.md](CONTRIBUTING.md).

setup.cfg

@@ -7,12 +7,12 @@ long_description_content_type = text/markdown
 url = https://github.com/JoshData/python-email-validator
 author = Joshua Tauberer
 author_email = jt@occams.info
-license = CC0 (copyright waived)
+license = Unlicense
 license_files = LICENSE
 classifiers =
     Development Status :: 5 - Production/Stable
     Intended Audience :: Developers
-    License :: CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
+    License :: Unlicense
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9