使用python socket实现smtp协议，出现了神奇的问题

2017-12-31 02:05:36 1.2k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

基于 Node.js + MongoDB 技术栈的小众开源短链接程序 —— Lynx 开源的短链接程序有很多，像 YOURLS、Shlink 等大多采用 PHP + MySQL 技术栈。但我之前的服务器配置一般，再加上自己写的小玩具使用的是 Node.js + MongoDB，这些环境已经装在服务器上了，因此更倾向于寻找一款同样基于这套技术栈的短链接程序。搜索了很久才找到这么一款基于的短链接程序——Lynx。这个开源项目非常小众，Star 数只有两百多。阅读详情

问题在于虚线之间，用户信息验证不通过，我仔细检查过协议里登录的格式，没有发现问题。我163邮箱已经开启了smtp服务，密码也用的是服务密码。由于只是实验用的邮箱，服务密码没有屏蔽，大佬可以拿去试一下= =难道现在smtp邮件已经改了发送方式吗？= =

from socket import *           

import base64



msg = "\r\n I Love Computer Networks!"                                  #Declarations

endmsg="\r\n.\r\n"

mailfrom = "MAIL FROM:<l847238926@163.com>\r\n"

rcptto="RCPT TO:<754845950@qq.com>\r\n"

data = "DATA\r\n"

quitmsg="QUIT\r\n"



#Choose a mail server (e.g. Google mail server) and call it mailserver

mailserver="smtp.163.com"                                               #Use the local Host as SMTP Server

mailPort=25                                                           #Specify Port For Local SMTP

connectaddress=(mailserver,mailPort)



#Create socket called clientsocket and establish a TCP connection with mailserver

clientSocket=socket(AF_INET,SOCK_STREAM)                                #Assign IP address and port number

clientSocket.connect(connectaddress)                                    #Connect to Local SMTP

recv=clientSocket.recv(1024)

print(recv)

if recv[:3].decode()!='220':                                            #Print Error Clause

    print("220 reply not received from server")



#Send HELO command and print server response.

heloCommand="HELO Alice\r\n"

clientSocket.send(bytes(heloCommand.encode()))

recv1=clientSocket.recv(1024)

print(recv1.decode())

if recv1.decode()[:3]!="250":

    print("250 reply not received from server.")



print('-----------------------------------')



loginini = b'AUTH LOGIN\r\n'

userCommand = base64.b64encode(b'18390242095@163.com\r\n') 

passwordCommand = base64.b64encode(b'xudoudou3661615\r\n') 

clientSocket.send(loginini)

recv2 = clientSocket.recv(1024).decode('utf-8')

print('222+ ',recv2)



clientSocket.send(userCommand)

recv3 = clientSocket.recv(1024).decode('utf-8')

print('333+ ',recv3)



clientSocket.send(passwordCommand)

recv4 = clientSocket.recv(1024).decode('utf-8')

print('444+ ',recv4)

print('-----------------------------------')

#Send MAIL FROM command and print server response.

clientSocket.send(bytes(mailfrom.encode()))                             #send mail, had to convert to bytes

check=clientSocket.recv(1024)

print(check)                                                            #print confirmation of working messages



#Send RCPT TO command and print server response.

clientSocket.send(bytes(rcptto.encode()))                               #recieve, had to convert to bytes

check1=clientSocket.recv(1024)

print(check1)                                                           #print confirmation of working messages



#Send DATA command and print server response.

clientSocket.send(bytes(data.encode()))                                 #DATA, had to convert to bytes

check2=clientSocket.recv(1024)

print(check2)                                                           #print confirmation of working messages



#Message ends with a single period.

clientSocket.send(bytes((mailfrom+msg+endmsg).encode()))                #Concatinate bits for message

check3=clientSocket.recv(1024)

print(check3)                                                           #print confirmation of working messages



#Send QUIT command and get server response.

clientSocket.send(bytes(quitmsg.encode()))                              #Quit the session

check4=clientSocket.recv(1024)

print(check4)