在Python中保存到.msg文件，或者将邮件发送到文件系统

Question

我正在使用emails库发送邮件，但还需要将其保存为.msg文件。我做了一些研究，也阅读了msg格式规范，偶然发现了this SO answer，它展示了如何在C#中向文件系统发送邮件，我想知道在Python中是否也可以。

Answer 1

这是可能和容易的。假设msg是一个以前编写的消息，包含所有头和内容，并且您希望将其写入文件对象out。你只需要：

gen = email.generator.Generator(out)  # create a generator
gen.flatten(msg)   # write the message to the file object

完整示例：

import email

# create a simple message
msg = email.mime.text.MIMEText('''This is a simple message.
And a very simple one.''')
msg['Subject'] = 'Simple message'
msg['From'] = 'sender@sending.domain'
msg['To'] = 'rcpt@receiver.domain'

# open a file and save mail to it
with open('filename.elm', 'w') as out:
    gen = email.generator.Generator(out)
    gen.flatten(msg)

filename.elm的内容是：

Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: Simple message
From: sender@sending.domain
To: rcpt@receiver.domain

This is a simple message.
And a very simple one.

Answer 2

这在Python中是可行的，我尝试了以下代码，将outlook邮件保存为文件夹中的.msg。 注意：确保outlook对目标文件夹具有写访问权限，默认情况下目标文件夹是Python脚本的位置

from win32com.client import Dispatch

outlook = Dispatch("Outlook.Application").GetNamespace("MAPI") 
inbox = outlook.GetDefaultFolder(6)
messages = inbox.items
for msg in messages:
  name = msg.subject
  name = str(name)
  name = name + ".msg"
  msg.saveas(name)

Answer 3

是的，这是可能的。 有用于这些目的的模块，称为MSG PY。 例如：

from independentsoft.msg import Message
from independentsoft.msg import Recipient
from independentsoft.msg import ObjectType
from independentsoft.msg import DisplayType
from independentsoft.msg import RecipientType
from independentsoft.msg import MessageFlag
from independentsoft.msg import StoreSupportMask

message = Message()

recipient1 = Recipient()
recipient1.address_type = "SMTP"
recipient1.display_type = DisplayType.MAIL_USER
recipient1.object_type = ObjectType.MAIL_USER
recipient1.display_name = "John Smith"
recipient1.email_address = "John@domain.com"
recipient1.recipient_type = RecipientType.TO

recipient2 = Recipient()
recipient2.address_type = "SMTP"
recipient2.display_type = DisplayType.MAIL_USER
recipient2.object_type = ObjectType.MAIL_USER
recipient2.display_name = "Mary Smith"
recipient2.email_address = "Mary@domain.com"
recipient2.recipient_type = RecipientType.CC

message.subject = "Test"
message.body = "Body text"
message.display_to = "John Smith"
message.display_cc = "Mary Smith"
message.recipients.append(recipient1)
message.recipients.append(recipient2)
message.message_flags.append(MessageFlag.UNSENT)
message.store_support_masks.append(StoreSupportMask.CREATE)

message.save("e:\\message.msg")