send_mass_emails与EmailMultiAlternatives

Question

我试图建立一个通讯应用程序，并希望发送50封电子邮件与一个连接。send_mass_mail()看起来很完美，但我不知道如何将它与EmailMultiAlternatives结合起来。

这是我的代码，只发送一封只有一个连接的电子邮件：

html_content = render_to_string('newsletter.html', {'newsletter': n,})               
text_content = "..."                      
msg = EmailMultiAlternatives("subject", text_content, "from@bla", ["to@bla"])                                      
msg.attach_alternative(html_content, "text/html")                                                                                                                                                                               
msg.send()  

使用上述代码和send_mass_mail的工作示例将是很好的，谢谢！

Answer 1

不可能直接将send_mass_mail()与EmailMultiAlternatives一起使用。但是，根据Django文件，send_mass_mail()只是一个利用EmailMessage类的包装器。EmailMultiAlternatives是EmailMessage的子类。EmailMessage有一个“connection”参数，允许您指定向所有收件人发送消息时使用的单个连接，即与send_mass_mail()提供的相同功能。您可以使用连接()函数获得由SMTP设置在settings.py中定义的SMTP连接。

我认为下列(未经测试的)代码应该有效：

from django.core.mail import get_connection, EmailMultiAlternatives

connection = get_connection() # uses SMTP server specified in settings.py
connection.open() # If you don't open the connection manually, Django will automatically open, then tear down the connection in msg.send()

html_content = render_to_string('newsletter.html', {'newsletter': n,})               
text_content = "..."                      
msg = EmailMultiAlternatives("subject", text_content, "from@bla", ["to@bla", "to2@bla", "to3@bla"], connection=connection)                                      
msg.attach_alternative(html_content, "text/html")                                                                                                                                                                               
msg.send() 

connection.close() # Cleanup

Answer 2

即send_mass_mail()重写为使用EmailMultiAlternatives

from django.core.mail import get_connection, EmailMultiAlternatives

def send_mass_html_mail(datatuple, fail_silently=False, user=None, password=None, 
                        connection=None):
    """
    Given a datatuple of (subject, text_content, html_content, from_email,
    recipient_list), sends each message to each recipient list. Returns the
    number of emails sent.

    If from_email is None, the DEFAULT_FROM_EMAIL setting is used.
    If auth_user and auth_password are set, they're used to log in.
    If auth_user is None, the EMAIL_HOST_USER setting is used.
    If auth_password is None, the EMAIL_HOST_PASSWORD setting is used.

    """
    connection = connection or get_connection(
        username=user, password=password, fail_silently=fail_silently)
    messages = []
    for subject, text, html, from_email, recipient in datatuple:
        message = EmailMultiAlternatives(subject, text, from_email, recipient)
        message.attach_alternative(html, 'text/html')
        messages.append(message)
    return connection.send_messages(messages)

Answer 3

我采用了一种混合的方法，向用户发送纯文本和html消息，并为每个用户个性化消息。

我从发送多封电子邮件 od Django文档一节开始。

from django.conf import settings
from django.contrib.auth.models import User
from django.core import mail
from django.core.mail.message import EmailMultiAlternatives
from django.template.loader import get_template
from django.template import Context

...

connection = mail.get_connection()
connection.open()
messages = list()

for u in users:
    c = Context({ 'first_name': u.first_name, 'reseller': self,})
    subject, from_email, to = 'new reseller', settings.SERVER_EMAIL, u.email
    text_content = plaintext.render(c)
    html_content = htmly.render(c)
    msg = EmailMultiAlternatives(subject, text_content, from_email, [to])
    msg.attach_alternative(html_content, "text/html")
    messages.append(msg)

connection.send_messages(messages)
connection.close()