python发送多人邮件_Python如何发送邮件给多人

网上找到的一般是这样的:

import smtplib

import email.MIMEMultipart

import email.MIMEText

import email.MIMEBase

import os.path

From = "sender address"

To = "recipients"

file_name = "file name"

server = smtplib.SMTP("smtp server address")

server.login("username","password") #仅smtp服务器需要验证时

# 构造MIMEMultipart对象做为根容器

main_msg = email.MIMEMultipart.MIMEMultipart()

# 构造MIMEText对象做为邮件显示内容并附加到根容器

text_msg = email.MIMEText.MIMEText("this is a test text to text mime")

main_msg.attach(text_msg)

# 构造MIMEBase对象做为文件附件内容并附加到根容器

contype = 'application/octet-stream'

maintype, subtype = contype.split('/', 1)

## 读入文件内容并格式化

data = open(file_name, 'rb')

file_msg = email.MIMEBase.MIMEBase(maintype, subtype)

file_msg.set_payload(data.read( ))

data.close( )

email.Encoders.encode_base64(file_msg)

## 设置附件头

basename = os.path.basename(file_name)

file_msg.add_header('Content-Disposition',

'attachment', filename = basename)

main_msg.attach(file_msg)

# 设置根容器属性

main_msg['From'] = From

main_msg['To'] = To

main_msg['Subject'] = "attach test "

main_msg['Date'] = email.Utils.formatdate( )

# 得到格式化后的完整文本

fullText = main_msg.as_string( )

# 用smtp发送邮件

try:

server.sendmail(From, To, fullText)

finally:

server.quit() 要注意的是，如果发送给多人，带附件的话，收件人地址是一个list,不是string。