使用 send_mail 发送电子邮件时出现 Django“不正确的填充”错误

Question

我无法使用 django.core.mail.send_mail 功能发送电子邮件。

使用 mail_admins 和 mail_managers 发送邮件工作正常，所以我猜问题不是我的邮件配置。

我在

中收到“不正确的填充”错误

File "/usr/lib/python2.6/base64.py" in decodestring
321.     return binascii.a2b_base64(s)

这也很奇怪，因为我的 django 服务器在 virtualenv 中运行。 完整的追溯如下：

Traceback:
File "/env_frugar/lib/python2.6/site-packages/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/env/lib/python2.6/site-packages/django/contrib/auth/decorators.py" in _wrapped_view
  23.                 return view_func(request, *args, **kwargs)
File "/env/lib/python2.6/site-packages/django/views/generic/base.py" in view
  47.             return self.dispatch(request, *args, **kwargs)
File "/env/lib/python2.6/site-packages/django/views/generic/base.py" in dispatch
  68.         return handler(request, *args, **kwargs)
File "/env/lib/python2.6/site-packages/django/views/generic/edit.py" in post
  172.         return super(BaseCreateView, self).post(request, *args, **kwargs)
File "/env/lib/python2.6/site-packages/django/views/generic/edit.py" in post
  138.             return self.form_valid(form)
File "/env/lib/python2.6/site-packages/django/views/generic/edit.py" in form_valid
  112.         self.object = form.save()
File "/env/lib/python2.6/site-packages/django/forms/models.py" in save
  363.                              fail_message, commit, construct=False)
File "/env/lib/python2.6/site-packages/django/forms/models.py" in save_instance
  85.         instance.save()
File "/env/lib/python2.6/site-packages/django/db/models/base.py" in save
  460.         self.save_base(using=using, force_insert=force_insert, force_update=force_update)
File "/env/lib/python2.6/site-packages/django/db/models/base.py" in save_base
  570.                 created=(not record_exists), raw=raw, using=using)
File "/env/lib/python2.6/site-packages/django/dispatch/dispatcher.py" in send
  172.             response = receiver(signal=self, sender=sender, **named)
File "/myproject/myapp/models.py" in send_email_after_widget_creation
  88.         send_mail(subject, message, from_email, recipient_list, fail_silently= not settings.DEBUG)
File "/env/lib/python2.6/site-packages/django/core/mail/__init__.py" in send_mail
  61.                         connection=connection).send()
File "/env/lib/python2.6/site-packages/django/core/mail/message.py" in send
  251.         return self.get_connection(fail_silently).send_messages([self])
File "/env/lib/python2.6/site-packages/django/core/mail/backends/smtp.py" in send_messages
  79.             new_conn_created = self.open()
File "/env/lib/python2.6/site-packages/django/core/mail/backends/smtp.py" in open
  48.                 self.connection.login(self.username, self.password)
File "/usr/lib/python2.6/smtplib.py" in login
  574.             (code, resp) = self.docmd(encode_cram_md5(resp, user, password))
File "/usr/lib/python2.6/smtplib.py" in encode_cram_md5
  537.             challenge = base64.decodestring(challenge)
File "/usr/lib/python2.6/base64.py" in decodestring
  321.     return binascii.a2b_base64(s)

对可能发生的事情有什么想法吗？

更新：

主题是（葡萄牙语）：

[Django] [FRUGAR-WiDGET] novo widget criado

身体是：

Novo widget criado:
Nome:test 10
Por: dudu

Answer 1

Base-64 将 3 个字节（在 0-255 范围内的回显）编码为 4 个字节（每个 范围更有限）。输出的长度是 always 的倍数 4（忽略空格）；该方法添加了额外的填充字节（ASCII '=') 以确保如果输入的长度不是 3 的倍数。

因此，如果解码引发“不正确的填充”错误，则删除任何 空格并附加额外的 ASCII '=' 以使其长度成为 3、然后再试解码。 （或者你可以重复添加一个垫 字符并重试，最多 3 次。）

对您来说最简单的解决方案是确保您的数据包始终是 4 字节的倍数。

Answer 2

问题出在身份验证上。 Django 无法通过邮件服务器进行身份验证。一旦我解决了这个问题，问题就消失了。