發郵件是一種很常見的操作，本篇主要介紹一下如何用python實作自動發件，
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.header import Header
from email.mime.image import MIMEImage
import time
mail_host="smtp.126.com"
mail_user="xxx@126.com"
mail_pass="******"#注意如果郵箱開啟了授權碼，此處要填寫授權碼，否則會報smtplib.SMTPAuthenticationError: (535, b'Error: authentication failed')
sender="xxx@126.com"
receiver = ['郵箱1','郵箱2']#群發郵件
for i in range(n):#自定義回圈發多少遍
try:
message = MIMEMultipart()
message["From"] = Header(sender)
message["To"] = ','.join(receiver)
message["Subject"] = Header("主題", "utf-8").encode()#主題
message.attach(MIMEText("正文", "plain", "utf-8"))#正文
"""
定附件
"""
att = MIMEText(open(r'C:\Users\Administrator\Desktop\1.txt').read(), "base64", "utf-8")
att["Content-Type"] = 'application/octet-stream'
att.add_header("Content-Disposition", 'attachment', filename="1.txt")#這一步可避免檔案不能正常打開
message.attach(att)
"""
構造圖片（以附件形式上傳）
"""
image = MIMEImage(open(r'C:\Users\Administrator\Desktop\1.jpg', 'rb').read())
image.add_header('Content-ID', '<image1>')#可避免圖片不能正常打開
image["Content-Disposition"] = 'attachment; filename="picture.jpg"'
message.attach(image)
"""
發送郵件
"""
smtp = smtplib.SMTP_SSL(host=mail_host)
smtp.connect(host=mail_host, port=465)
smtp.login(mail_user, mail_pass)
smtp.sendmail(sender, message['To'].split(','), message.as_string())
print("在%s第" % ctime(), str(i+1), "封郵件發送")
smtp.quit()
except smtplib.SMTPException as e:
raise e
最終實作
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