从.msg文件提取邮箱至TXT时遇UnicodeEncodeError问题求助

一、先修复当前的编码错误 #

你遇到的UnicodeEncodeError是因为写入relat.txt时用了系统默认的charmap编码（Windows下默认编码），它无法处理某些特殊字符。另外第二段代码里write()方法不能传encoding参数，属于语法错误。

修正后的基础代码：

path = r'C:\Dev\Canedo\a.msg'
# 读取时用Latin-1保证不丢失字符
with open(path, encoding='Latin-1') as mail:
    mail_contents = mail.read()
# 写入时指定utf-8编码，支持所有Unicode字符
with open("relat.txt", "w+", encoding='utf-8') as t:
    t.write(mail_contents)

用with语句还能自动管理文件句柄，避免资源泄漏。

二、正确提取.msg邮件正文里的邮箱地址 #

直接把.msg当文本文件读会包含大量邮件格式冗余内容，建议用专门的库解析Outlook邮件：

方法1：用win32com.client（Windows系统，需先安装pywin32） #

import win32com.client
import re

def extract_email_from_msg(msg_path):
    outlook = win32com.client.Dispatch("Outlook.Application").GetNamespace("MAPI")
    msg = outlook.OpenSharedItem(msg_path)
    # 获取纯文本邮件正文
    body = msg.Body
    # 正则匹配邮箱地址
    email_pattern = re.compile(r'\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b')
    emails = email_pattern.findall(body)
    # 返回第一个匹配的邮箱（可按需求调整逻辑）
    return emails[0] if emails else None

# 处理单个.msg文件
msg_path = r'C:\Dev\Canedo\a.msg'
email = extract_email_from_msg(msg_path)
if email:
    with open("relat.txt", "w", encoding='utf-8') as f:
        f.write(email)

方法2：用msg-parser库（跨平台，需先安装） #

先执行安装命令：pip install msg-parser

from msg_parser import MsOxMessage
import re

def extract_email_from_msg(msg_path):
    msg = MsOxMessage(msg_path)
    body = msg.get_body()
    email_pattern = re.compile(r'\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b')
    emails = email_pattern.findall(body)
    return emails[0] if emails else None

msg_path = r'C:\Dev\Canedo\a.msg'
email = extract_email_from_msg(msg_path)
if email:
    with open("relat.txt", "w", encoding='utf-8') as f:
        f.write(email)

三、批量处理多个.msg文件 #

如果要处理大量文件，可以遍历目标文件夹：

import os
import re
from msg_parser import MsOxMessage

def extract_email_from_msg(msg_path):
    try:
        msg = MsOxMessage(msg_path)
        body = msg.get_body()
        email_pattern = re.compile(r'\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b')
        emails = email_pattern.findall(body)
        return emails[0] if emails else "未找到邮箱"
    except Exception as e:
        return f"处理失败：{str(e)}"

# 遍历目标文件夹
folder_path = r'C:\Dev\Canedo'
for filename in os.listdir(folder_path):
    if filename.endswith('.msg'):
        msg_path = os.path.join(folder_path, filename)
        email = extract_email_from_msg(msg_path)
        # 每个.msg对应一个同名TXT文件
        txt_filename = os.path.splitext(filename)[0] + '.txt'
        with open(os.path.join(folder_path, txt_filename), 'w', encoding='utf-8') as f:
            f.write(email)

内容的提问来源于stack exchange，提问作者JameBernabe