发送带附件的电子邮件

Question

我正在尝试编写一个发送带有附件的电子邮件的函数。 目前，它会发送一封电子邮件，但没有附件。 有人可以评论吗？

    msg = MIMEMultipart()

    msg['From'] = my email

    msg['To'] = client email address

    msg['Subject'] = subject

    body = content

    msg.attach(MIMEText(body, 'plain'))
    ##### Load the address of the file which should be attached*********************************     
    filename = filedialog.askopenfilename(initialdir = "/",title = "Select file",filetypes = (("Text 
    files","*.txt"),("all files","*.*")))     

    Myfile = open(filename)

    attachment = MIMEText(Myfile.read())
    attachment.add_header('Content-Disposition', 'attachment', filename=filename)           


    msg.attach(attachment)
    mail = smtplib.SMTP('smtp.gmail.com', 587)
    msg = f'Subject: {subject}\n\n{content}'
    mail.ehlo()
    mail.starttls()
    mail.login('My email address', 'password')
    mail.sendmail('client email', My email address, msg)
    mail.close()

谢谢大家

Answer 1

首先，正如我在评论中提到的，你在这里覆盖了msg ：

msg = f'Subject: {subject}\n\n{content}'

此时，用于指向的MIMEMultipart对象msg被销毁，您将只发送该新字符串。 难怪为什么没有附件：这个字符串显然没有附件。

现在，您应该真正使用email模块的新 API，如文档中所示。 但既然你已经使用旧的API（在MIMEMultipart类，例如），你需要转换msg为一个字符串，如这里：

# This is copied straight from the last link

msg = MIMEMultipart('alternative')
msg['Subject'] = "Link"
msg['From'] = me
msg['To'] = you

...

part1 = MIMEText(text, 'plain')  # example attachment

# Attach parts into message container.
# According to RFC 2046, the last part of a multipart message, in this case
# the HTML message, is best and preferred.
msg.attach(part1)

mail.sendmail(
    me, you,
    msg.as_string()  # CONVERT TO STRING
)