一个python的邮件发送脚本，自动，定时，可以附件发送，抄送，附有说明文件

#!/bin/env python
# -*- coding: utf-8 -*-

import datetime
import smtplib
import os,sys
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from optparse import OptionParser

EMAILHOME=sys.path[0]
#sender name and password
sendername=""
senderpass=""
#list of all receiver (include cc-receiver)
receiverlist=[]
receivertmplist=[]
receivercctmplist=[]

#get the username and pasword
#no try catch here
def getUserAndPass(senderfile):
    upf=open(senderfile)
    username=upf.readline()
    password=upf.readline()
    upf.close()
    return (username.strip(os.linesep),password.strip(os.linesep))

#get the receiver list
#return the list with no ''
def getReceiverList(filename):
    lif=open(filename)
    li=lif.readlines()
    lif.close()
    for x in range(len(li)):
        li[x]=li[x].strip().strip(os.linesep)
    while '' in li:
        li.remove('')
    return (li)

#get content of the mail
def getContent(filename):
    contenttmp=''
    if os.path.exists(filename):
        contentf=open(filename)
        contenttmp=contentf.read()
        contentf.close()
    return contenttmp

#parameters process
parser = OptionParser()

parser.add_option('-s', '--sender', dest='sender',
        help='file for sender of the mail', default=None)
parser.add_option('-r', '--receiver', dest='receiver',
        help='list file for receivers of the mail',default=None)
parser.add_option('-p', '--cc', dest='cc',
        help='list file for receivers of carbon copy', default=None)
parser.add_option('-t', '--title', dest='title',
        help='title of the email,string', default='Auto email')
parser.add_option('-c', '--content', dest='content',
        help='content of the mail,must be a file',default=None)
parser.add_option('-a', '--attach', dest='attach',
        help='attachment of the file',default=None)
parser.add_option('-n', '--nameattach', dest='nameattach',
        help='name for attachment of the file',default=None)
parser.add_option('-l', '--server', dest='server',
        help='log in to the server',default='smtp.163.com')
parser.add_option('-i', '--info', dest='info',
        help='information of the content,string,but not file',default='Auto email')
parser.add_option('-f', '--form', dest='form',
        help='form of the content,html or plain',default='plain')

(options, args) = parser.parse_args()

#get sender infor
if not options.sender:
    if os.path.exists(EMAILHOME+r'/sender.list'):
        (sendername,senderpass)=getUserAndPass(EMAILHOME+r'/sender.list')
        if sendername.strip()=="" or senderpass.strip()=="":
            print ("no sender!")
            exit(0)
    else:
        print ("no sender!")
        exit(0)
else:
    if os.path.exists(options.sender):
        (sendername,senderpass)=getUserAndPass(EMAILHOME+r'/sender.list')
        if sendername.strip()=="" or senderpass.strip()=="":
            print ("no sender!")
            exit(0)
    else:
        print ("the file for sender list does not exists!")
        exit(0)

#get list of all receiver
if not options.receiver:
    if os.path.exists(EMAILHOME+r'/receiver.list') or os.path.exists(EMAILHOME+r'/receivercc.list'):
        if os.path.exists(EMAILHOME+r'/receiver.list'):
            receivertmplist= getReceiverList(EMAILHOME+r'/receiver.list')
        if os.path.exists(EMAILHOME+r'/receivercc.list'):
            receivercctmplist= getReceiverList(EMAILHOME+r'/receivercc.list')
        receiverlist=receivertmplist+receivercctmplist
        if len(receiverlist)==0:
            print ("no receiver!")
            exit(0)
    else:
        print ("no receiver list file!")
        exit(0)
else:
    if os.path.exists(options.receiver) or os.path.exists(options.cc):
        if os.path.exists(options.receiver):
            receivertmplist= getReceiverList(options.receiver)
        if os.path.exists(options.cc):
            receivercctmplist= getReceiverList(options.cc)
        receiverlist=receivertmplist+receivercctmplist
        if len(receiverlist):
            print ("no receiver from the list file!")
            exit(0)
    else:
        print ("receiver list file does not exist!")
        exit(0)

if  options.attach and not options.nameattach:
    print ("give a name to the attachment!")
    exit(0)

#make a mail
mailall=MIMEMultipart()    

#content of the mail
if options.content:
    mailcontent =getContent(options.content)
    mailall.attach(MIMEText(mailcontent,options.form,'utf-8'))
elif options.info:
    mailcontent = str(options.info)
    mailall.attach(MIMEText(mailcontent,options.form,'utf-8'))

#attachment of the mail
if options.attach:
    mailattach =getContent(options.attach)
    if mailattach !='':
        contype = 'application/octet-stream'
        maintype,subtype=contype.split('/',1)
        attfile=MIMEBase(maintype,subtype)
        attfile.set_payload(mailattach)
        attfile.add_header('Content-Disposition','attachment',options.nameattach)
        print ("attach file prepared!")
        mailall.attach(attfile)

#title,sender,receiver,cc-receiver,
mailall['Subject']=options.title
mailall['From']=sendername
mailall['To']=str(receivertmplist)
if len(receivercctmplist) !=0:
    mailall['CC']=str(receivercctmplist)

#get the text of mailall
fullmailtext=mailall.as_string()
print ("prepare fullmailtext ok.")
mailconnect = smtplib.SMTP(options.server)
try:
    mailconnect.login(sendername,senderpass)
except Exception as e:
    print ("error when connect the smtpserver with the given username and password !")
    print (e)
    exit(0)

print ("connect ok!")

try:
    mailconnect.sendmail(sendername, receiverlist, fullmailtext)
except Exception as e:
    print ("error while sending the email!")
finally:
    mailconnect.quit()

print ('email to '+str(receiverlist)+' over.')

print ('***'*80)

说明：

#mail.py使用方法：

1，本脚本同目录下文件介绍：
sender.list:邮件发送者邮箱和密码，第一行账号（如example@example.com）,第二行密码（必须项，不能为空）
receiver.list:邮件接收者列表，每行一个收件人(如example@example.com)
receivercc.list:邮件抄送者列表，每行一个收件人(如example@example.com)

调用方法举例1：
把发件人和收件人信息(sender.list和receiver.list)填好后，在mail.py所在目录执行
python mail.py  -s sender.list -r receiver.list

2,其它帮助信息获得方法：
在mail.py所在目录执行：python mail.py -h
显示：
Options:
  -h, --help            show this help message and exit
  -s SENDER, --sender=SENDER                                     //配置本脚本发件人信息存放的文件的路径  如 /tmp/tmp/list.list
                        file for sender of the mail
  -r RECEIVER, --receiver=RECEIVER                               //配置本脚本收件人列表存放的文件的路径  如 /tmp/tmp/list.list
                        list file for receivers of the mail
  -p CC, --cc=CC        list file for receivers of carbon copy   //配置抄送收件人列表存放的文件的路径  如 /tmp/tmp/list.list
  -t TITLE, --title=TITLE                                        //配置邮件的标题，字符串(不能有空格)
                        title of the email,string
  -c CONTENT, --content=CONTENT                                  //配置邮件的内容，文件路径（和-i冲突时，-i参数无效）
                        content of the mail,must be a file
  -a ATTACH, --attach=ATTACH                                     //配置邮件的附件，文件路径（有附件时，必须配置-n参数）
                        attachment of the file
  -n NAMEATTACH, --nameattach=NAMEATTACH                         //配置邮件的附件名称，字符串(不能有空格)（有附件时，必须配置本参数）
                        name for attachment of the file
  -l SERVER, --server=SERVER                                     //配置邮件的服务器，默认是smtp.163.com
                        log in to the server
  -i INFO, --info=INFO  information of the content,string,but not file //配置邮件的内容，字符串(不能有空格)（和-c冲突时，本参数无效）
  -f FORM, --form=FORM  form of the content,html or plain        //配置邮件的内容的类型，默认是plain
  
调用方法举例2：
在mail.py所在目录执行：
python mail.py  -s /root/tmp/sender.list -r /root/tmp/receiver.list -p /root/tmp/receivercc.list  -t test_the_py -c /root/tmp/content.log -a /root/tmp/attch.log -n attachname1.log

将会把/root/tmp/content.log作为文件内容，
把/root/tmp/attch.log作为附件，
把attachname1.log作为附件名称，
把test_the_py作为邮件标题的邮件；
从/root/tmp/sender.list文件里的发件人，
发送到/root/tmp/receiver.list和/root/tmp/receivercc.list文件里的收件人列表。