如何在 imaplib 或 imapclient 中使用 X-GM-THRID 发送电子邮件？

问：

在过去的几天里，我一直在尝试从谷歌发送电子邮件，并且感到非常沮丧。我想像 gmail 网络客户端通常所做的那样，将 gmail 中的所有电子邮件分组到线程中，并将每个线程中的所有文本分别连接成不同的字符串并将它们保存在文档中。imaplib 中的方法或解决方案会很棒，但我认为 imapclient 是高级的，所以我真的很喜欢。

到目前为止，我已经弄清楚了如何从电子邮件中提取文本，但我似乎找不到任何有关如何使用“X-GM-THRID”在我的收件箱中发送电子邮件的资源。我到处找，几乎尝试了一切。任何帮助将不胜感激。

编辑：这是我到目前为止从一封电子邮件中提取文本的代码。

#Import necessary packages
!pip install imaplib2
!pip install html2text
import imaplib2 as imap
import email
from email.header import decode_header, make_header
import html2text
import re

#Login
con = imap.IMAP4_SSL(imap_server)
con.login(username, password)

#Get list of emails in inbox
Mailbox = 'INBOX'
con.select(Mailbox, readonly = True)
_, email_ids = con.search(None, "ALL")
email_ids = email_ids[0].split()
print("Number of emails in ", Mailbox, " is: ", len(email_ids))

#Define function to extract text from an email given uid (Unique Identification Number)
def extract_text_from_email(uid):
    _, data = con.fetch(uid, "(RFC822)")
    email_message = email.message_from_bytes(data[0][1])
    text = ""
    text = text + "To: " + str(make_header(decode_header(email_message["To"]))) + ". "
    text = text + "From: " + str(make_header(decode_header(email_message["From"]))) + ". "
    text = text + "Date: " + str(make_header(decode_header(email_message["Date"]))) + ". "
    if email_message["BCC"]:
        text = text + "BCC: " + str(make_header(decode_header(email_message["BCC"]))) + ". "
    if email_message["Subject"]:
        text = text + "Subject: " + str(make_header(decode_header(email_message["Subject"]))) + ". "
    for part in email_message.walk():
        if part.get_content_type() == "text/plain":
            result = part.get_payload(decode = True).decode(part.get_content_charset())                  #Extracting payload if message type is plain text
            result = re.sub(r"http\S+", "url", result).replace("\n", " ").replace("\r","")               #Remove urls and replace them with "url" and remove "\n" and "\r"
            text = text + result
    return text

extract_text_from_email(email_ids[-1])