将一些文件附加到 MIME 多部分电子邮件

Posted 2023-03-15

【中文标题】将一些文件附加到 MIME 多部分电子邮件

【英文标题】：Attaching some files to MIME multipart email

【发布时间】：2019-04-06 16:48:24

【问题描述】：

如何使用 Python3 ？ 我想将一些附件作为“可下载内容”发送到我的 html 邮件（带有纯文本后备）。目前还没有找到任何东西...

编辑：经过几次尝试，我才成功发送文件。感谢您的提示@tripleee。但不幸的是，我的 HTML 现在以纯文本形式发送...

from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.image import MIMEImage
from email.utils import formatdate
from os.path import basename
import smtplib

login = "*********"
password = "*********"
server = "smail.*********:25"
files = ['Anhang/file.png']

# Create the root message and fill in the from, to, and subject headers
msg = MIMEMultipart('related')
msg['From'] = "*********"
msg['To'] = "*********"
msg['Date'] = formatdate(localtime=True)
msg['Subject'] = "*********"
msg['Reply-To'] = "*********"
msg.preamble = 'This is a multi-part message in MIME format.'

# Encapsulate the plain and HTML versions of the message body in an
# 'alternative' part, so message agents can decide which they want to display.
msgAlternative = MIMEMultipart('alternative')

with open('*********.txt', 'r') as plainTXT:
    plain = plainTXT.read()
plainTXT.close()
msgAlternative.attach(MIMEText(plain))

with open('*********.html', 'r') as plainHTML:
    html = plainHTML.read()
plainHTML.close()
msgAlternative.attach(MIMEText(html))

msg.attach(msgAlternative)

# Image
for f in files or []:
    with open(f, "rb") as fp:
        part = MIMEImage(
            fp.read(),
            Name=basename(f)
        )
    # closing file
    part['Content-Disposition'] = 'attachment; filename="%s"' % basename(f)
    msg.attach(part)


# create server
server = smtplib.SMTP(server)
server.starttls()

# Login Credentials for sending the mail
server.login(login, password)

# send the message via the server.
server.sendmail(msg['From'], msg['To'], msg.as_string())

server.quit()

print("successfully sent email to %s:" % (msg['To']));

【问题讨论】：

这样的问题很多。您的似乎不包含任何实际附加任何图像的尝试，因此很难看到您需要什么帮助。基本上，创建一个multipart/related 并在其中放置multipart/alternative 和二进制文件为image/png 或其他。如果您真的不希望收件人的邮件客户端尝试呈现它们，您可能需要输入Content-Disposition: attachment

也许这可以帮助一个开始？ ***.com/questions/48562935/…

更改了我原来的帖子。现在唯一要做的就是修复纯 html 的东西。谢谢！

【参考方案1】：

我只需要使用MIMEText(html, 'html') 作为我的 HTML 的附加部分。 工作代码：

from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.image import MIMEImage
from email.utils import formatdate
from os.path import basename
import smtplib

login = "YourLogin"
password = "YourPassword"
server = "SMTP-Server:Port"
files = ['files']

# Create the root message and fill in the from, to, and subject headers
msg = MIMEMultipart('related')
msg['From'] = "FromEmail"
msg['To'] = "ToEmail"
msg['Date'] = formatdate(localtime=True)
msg['Subject'] = "EmailSubject"
msg['Reply-To'] = "EmailReply"
msg.preamble = 'This is a multi-part message in MIME format.'

# Encapsulate the plain and HTML versions of the message body in an
# 'alternative' part, so message agents can decide which they want to display.
msgAlternative = MIMEMultipart('alternative')

with open('YourPlaintext.txt', 'r') as plainTXT:
    plain = plainTXT.read()
plainTXT.close()
msgAlternative.attach(MIMEText(plain, 'plain'))

with open('YourHTML.html', 'r') as plainHTML:
    html = plainHTML.read()
plainHTML.close()
msgAlternative.attach(MIMEText(html, 'html'))

msg.attach(msgAlternative)

# Image
for f in files or []:
    with open(f, "rb") as fp:
        part = MIMEImage(
            fp.read(),
            Name=basename(f)
        )
    # closing file
    part['Content-Disposition'] = 'attachment; filename="%s"' % basename(f)
    msg.attach(part)


# create server
server = smtplib.SMTP(server)
server.starttls()

# Login Credentials for sending the mail
server.login(login, password)

# send the message via the server.
server.sendmail(msg['From'], msg['To'], msg.as_string())

server.quit()

print("successfully sent email to %s:" % (msg['To']));

感谢@tripleee