#25986: RFC 6532 support for e-mail
---------------------------------+--------------------
Reporter: sergei-maertens | Owner: nobody
Type: Bug | Status: new
Component: Core (Mail) | Version: 1.9
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
---------------------------------+--------------------
With Python 3.5 and Django 1.9 I'm running into trouble with
internationalized e-mail addresses. According to RFC 6532 it is possible
to have unicode characters in the e-mail address:
https://tools.ietf.org/html/rfc6532.html and this RFC *should* be
supported in Python 3.5:
https://docs.python.org/3/whatsnew/3.5.html#email. Steps to reproduce are
at the bottom of the ticket.
Now, for validating e-mail addresses in various places, Django calls
stdlib `mail.formataddr`, which doesn't seem to respect this RFC - not
even if you explicitly set the `EmailPolicy.utf8` (see
https://docs.python.org/3/library/email.policy.html#email.policy.EmailPolicy.utf8)
as I see no reference to that in the source code.
This function in the stdlib blatantly calls `address.encode('ascii')`.
Luckily, it's quite short, and I would suggest rolling 'our own'
`formataddr` function (for the time being). I'll bring this issue up on
the Python bug tracker as well. I think it's possible, as it's a relative
simple function of only 40 LoC, of which 12 lines docstring.
**Steps to reproduce**
Basically shell output:
{{{
#!bash
mkdir bug_email
cd bug_email
mkdir bug_email -p python3.5
(bug_email)➜ bug_email python --version
Python 3.5.1
(bug_email)➜ bug_email pip install Django==1.9
Collecting Django==1.9
Using cached Django-1.9-py2.py3-none-any.whl
Installing collected packages: Django
Successfully installed Django-1.9
(bug_email)➜ bug_email django-admin.py startproject bug_email .
# regular shell is enough to test
(bug_email)➜ bug_email ./manage.py shell
}}}
Shell session
{{{
#!python
>>> from django.core.mail.message import sanitize_address
>>> sanitize_address(('dummy', u'juan.ló[email protected]'), 'utf8')
Traceback (most recent call last):
File "/home/bbt/coding/.virtualenvs/bug_email/lib/python3.5/site-
packages/django/core/management/commands/shell.py", line 69, in handle
self.run_shell(shell=options['interface'])
File "/home/bbt/coding/.virtualenvs/bug_email/lib/python3.5/site-
packages/django/core/management/commands/shell.py", line 61, in run_shell
raise ImportError
ImportError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/home/bbt/coding/.virtualenvs/bug_email/lib/python3.5/site-
packages/django/core/mail/message.py", line 118, in sanitize_address
return formataddr((nm, addr))
File "/usr/lib64/python3.5/email/utils.py", line 91, in formataddr
address.encode('ascii')
UnicodeEncodeError: 'ascii' codec can't encode character '\xf3' in
position 6: ordinal not in range(128)
>>>
>>> sanitize_address(('dummy', u'juan.ló[email protected]'), 'idna')
Traceback (most recent call last):
File "/home/bbt/coding/.virtualenvs/bug_email/lib/python3.5/site-
packages/django/core/management/commands/shell.py", line 69, in handle
self.run_shell(shell=options['interface'])
File "/home/bbt/coding/.virtualenvs/bug_email/lib/python3.5/site-
packages/django/core/management/commands/shell.py", line 61, in run_shell
raise ImportError
ImportError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/home/bbt/coding/.virtualenvs/bug_email/lib/python3.5/site-
packages/django/core/mail/message.py", line 118, in sanitize_address
return formataddr((nm, addr))
File "/usr/lib64/python3.5/email/utils.py", line 91, in formataddr
address.encode('ascii')
UnicodeEncodeError: 'ascii' codec can't encode character '\xf3' in
position 6: ordinal not in range(128)
>>>
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/25986>
Django <https://code.djangoproject.com/>
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