Merge point release branch for version 2.1.2

Author: JoshData

.github/workflows/test_and_build.yaml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12.0"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v3

CHANGELOG.md

@@ -2,6 +2,11 @@ In Development
 --------------
 
 * A new option to parse `My Name <address@domain>` strings, i.e. a display name plus an email address in angle brackets, is now available. It is off by default.
+
+2.1.2 (June 16, 2024)
+---------------------
+
+* The domain name length limit is corrected from 255 to 253 IDNA ASCII characters. I misread the RFCs.
 * When a domain name has no MX record but does have an A or AAAA record, if none of the IP addresses in the response are globally reachable (i.e. not Private-Use, Loopback, etc.), the response is treated as if there was no A/AAAA response and the email address will fail the deliverability check.
 * When a domain name has no MX record but does have an A or AAAA record, the mx field in the object returned by validate_email incorrectly held the IP addresses rather than the domain itself.
 * Fixes in tests.

email_validator/rfc_constants.py

@@ -41,7 +41,7 @@
 EMAIL_MAX_LENGTH = 254
 LOCAL_PART_MAX_LENGTH = 64
 DNS_LABEL_LENGTH_LIMIT = 63  # in "octets", RFC 1035 2.3.1
-DOMAIN_MAX_LENGTH = 255  # in "octets", RFC 1035 2.3.4 and RFC 5321 4.5.3.1.2
+DOMAIN_MAX_LENGTH = 253  # in "octets" as transmitted, RFC 1035 2.3.4 and RFC 5321 4.5.3.1.2, and see https://stackoverflow.com/questions/32290167/what-is-the-maximum-length-of-a-dns-name
 
 # RFC 2142
 CASE_INSENSITIVE_MAILBOX_NAMES = [

email_validator/version.py

@@ -1 +1 @@
-__version__ = "2.1.1"
+__version__ = "2.1.2"

test_requirements.txt

@@ -7,20 +7,20 @@
 # the earliest Python version we support, and some exception
 # messages may depend on package versions, so we pin versions
 # for reproducible testing.)
-coverage==7.4.4
+coverage==7.5.3
 dnspython==2.6.1
-exceptiongroup==1.2.0
-flake8==7.0.0
+exceptiongroup==1.2.1
+flake8==7.1.0
 idna==3.7
 iniconfig==2.0.0
 mccabe==0.7.0
-mypy==1.9.0
+mypy==1.10.0
 mypy-extensions==1.0.0
-packaging==24.0
-pluggy==1.4.0
-pycodestyle==2.11.1
+packaging==24.1
+pluggy==1.5.0
+pycodestyle==2.12.0
 pyflakes==3.2.0
-pytest==8.1.1
+pytest==8.2.2
 pytest-cov==5.0.0
 tomli==2.0.1
-typing_extensions==4.11.0
+typing_extensions==4.12.2

tests/test_syntax.py

@@ -392,9 +392,9 @@ def test_domain_literal() -> None:
         ('obsolete."quoted".atom@example.com', 'The email address contains invalid characters before the @-sign: \'"\'.'),
         ('11111111112222222222333333333344444444445555555555666666666677777@example.com', 'The email address is too long before the @-sign (1 character too many).'),
         ('111111111122222222223333333333444444444455555555556666666666777777@example.com', 'The email address is too long before the @-sign (2 characters too many).'),
-        ('me@1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.111111111122222222223333333333444444444455555555556.com', 'The email address is too long (4 characters too many).'),
-        ('me@1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555566.com', 'The email address is too long after the @-sign (1 character too many).'),
-        ('me@中1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555566.com', 'The email address is too long after the @-sign.'),
+        ('meme@1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555.com', 'The email address is too long (4 characters too many).'),
+        ('me@1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.11111111112222222222333333333344444444445555555555.com', 'The email address is too long after the @-sign (1 character too many).'),
+        ('me@中1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444.com', 'The email address is too long after the @-sign.'),
         ('my.long.address@1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.11111111112222222222333333333344444.info', 'The email address is too long (2 characters too many).'),
         ('my.long.address@λ111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.11111111112222222222333333.info', 'The email address is too long (when converted to IDNA ASCII).'),
         ('my.long.address@λ111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444444444555555555.6666666666777777777788888888889999999999000000000.1111111111222222222233333333334444.info', 'The email address is too long (at least 1 character too many).'),