邮箱改域名

import imaplib
import email
from email.header import decode_header

def migrate_emails(old_domain, new_domain):
    # 连接到旧域名的邮件服务器
    old_mail = imaplib.IMAP4_SSL('mail.olddomain.com')
    old_mail.login('admin@olddomain.com', 'password')
    old_mail.select('inbox')

    # 连接到新域名的邮件服务器
    new_mail = imaplib.IMAP4_SSL('mail.newdomain.com')
    new_mail.login('admin@newdomain.com', 'password')
    new_mail.select('inbox')

    # 获取旧邮箱中的所有邮件
    _, data = old_mail.search(None, 'ALL')
    email_ids = data[0].split()

    for e_id in email_ids:
        _, msg_data = old_mail.fetch(e_id, '(RFC822)')
        for response_part in msg_data:
            if isinstance(response_part, tuple):
                msg = email.message_from_bytes(response_part[1])

                # 修改邮件地址
                for header in ['From', 'To', 'Cc', 'Bcc']:
                    if header in msg:
                        for part in msg.get_payload():
                            if part.get_content_type() == 'text/plain':
                                body = part.get_payload(decode=True).decode()
                                body = body.replace(old_domain, new_domain)
                                part.set_payload(body)

                # 发送修改后的邮件到新邮箱
                new_mail.append('inbox', None, None, msg.as_bytes())

    old_mail.close()
    old_mail.logout()
    new_mail.close()
    new_mail.logout()

migrate_emails('example.com', 'newdomain.com')