Django通过gmail的send_mail非常慢 [英] Django send_mail through gmail very slow
问题描述
当我尝试通过./manage.py shell发送邮件时，要花几分钟才能发送一封电子邮件。当我尝试在浏览器中提交表单后发送用户验证电子邮件时，浏览器会显示504超时，但最终会发送该电子邮件。
When I try send through ./manage.py shell it takes several minutes to send a single email. When I try to send a user verification email after a form submission in a browser the browser times out with a 504, but the email is eventually sent. What could be going on?
settings.py
settings.py
...
EMAIL_HOST = 'smtp.gmail.com'
EMAIL_HOST_USER = 'myemail@gmail.com'
EMAIL_PORT = 587
EMAIL_USE_TLS = True
DEFAULT_FROM_EMAIL = EMAIL_HOST_USER
EMAIL_HOST_PASSWORD = os.environ.get('PASSWORD')
...
views.py
class SignUpView(CreateView):
model = User
template_name = 'eventMap/register.html'
form_class = RegistrationForm
success_url="/"
def form_valid(self, form):
form.save()
username = form.cleaned_data['username']
email = form.cleaned_data['email']
salt = hashlib.sha1(str(random.random())).hexdigest()[:5]
activation_key = hashlib.sha1(salt+email).hexdigest()
key_expires = datetime.datetime.today() + datetime.timedelta(2)
#Get user by username
user=User.objects.get(username=username)
# Create and save user profile
new_profile = UserProfile(user=user, activation_key=activation_key,
key_expires=key_expires)
new_profile.save()
# Send email with activation key
email_subject = 'Account confirmation'
email_body = "Hey %s, thanks for signing up. To activate your account, click this link within \
48hours http://mywebsite.com/accounts/confirm/%s" % (username, activation_key)
send_mail(email_subject, email_body, 'myemail@gmail.com',
['mytestemail@gmail.com'], fail_silently=False)
return super(SignUpView, self).form_valid(form)
我在这篇文章中遇到了类似的情况，但是日志中没有提及不合格的主机名，例如
/var/log/mail.log
I came across this post about something similar but the logs don't mention anything about an unqualified hostname etc /var/log/mail.log
Jul 27 16:26:04 django postfix/qmgr[5975]: CAF7C1226F2: from=<>, size=3063, nrcpt=1 (queue active)
Jul 27 16:26:34 django postfix/smtp[12874]: connect to example.com[2606:2800:220:1:248:1893:25c8:1946]:25: Connection timed out
Jul 27 16:27:04 django postfix/smtp[12874]: connect to example.com[93.184.216.34]:25: Connection timed out
Jul 27 16:27:04 django postfix/smtp[12874]: CAF7C1226F2: to=<myemail@example.com>, relay=none, delay=368178, delays=368118/0.02/60/0, dsn=4.4.1, status=deferred (connect to example.com[93.184.216.34]:25: Connection timed out)
推荐答案
类似的情况，其中延迟和超时是由系统尝试通过IPv6连接到gmail引起的。
I had a similar case where the delay and timeout were caused by the system trying to connect to gmail over IPv6.
此线程有助于揭开谜团。
TLDR：
在主机上，尝试使用telnet连接到gmail。
On the host machine try using telnet to connect to gmail.
telnet smtp.gmail.com 587
如果它首先尝试通过IPv6连接（并阻塞了几分钟），然后在IPv4上成功连接，则可能是您的问题。
If it first attempts to connect over IPv6 (and blocks for a few minutes) followed by a successful connection on IPv4, then this is likely your problem.
解决方案：
import socket
EMAIL_HOST = socket.gethostbyname('smtp.gmail.com')
这可以确保python从一开始就通过IPv4连接到gmail。
This ensures that python will connect to gmail over IPv4 from the beginning.
更好的解决方案：
弄清楚为什么主机无法通过IPv6连接到gmail并解决该问题。也许调整防火墙规则以拒绝数据包而不是丢弃它们。
Figure out why your host can't connect to gmail over IPv6 and fix that issue. Perhaps adjusting firewall rules to reject packets instead of dropping them.
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