post office protocol

e-mail protocol has SMTP, POP2, POP3, IMAP4, etc., are subordinate to the TCP/IP protocol cluster, by default, the connection is established through TCP ports 25, 110 and 143 respectively. For different purposes and functions, we will adjust the

Summary of common PHP knowledge points: 1. The difference between echoprintprint_r: Echo is a PHP statement, and print and print_r are functions. The statement does not return values. the function can return values. Print can only Print values of

Summary of common PHP knowledge points: 1. The difference between echoprintprint_r: Echo is a PHP statement, and print and print_r are functions. The statement does not return values. the function can return values. Print can only Print values of

  POP3 is called Post Office Protocol version3, that is, Post Office Protocol version 3rd. It is used by the user agent to obtain the mail on the mail server. POP3 uses the C/S communication model, and the corresponding RFC file is RFC1939. This

TCP vs. UDP differencesTCP---Transmission Control Protocol, providing a connection-oriented, reliable byte-stream service. Before the customer and the server Exchange data with each other, a TCP connection must be established between the two parties

The Secret Garden of JavaMail and James, javamailjames JavaMail, as its name implies, provides developers with programming interfaces related to email processing. It is an API released by Sun to process emails. It can easily perform some common mail

Javamail-java provides a set of APIs to send and receive mailThere is a mail server in the middle:The client is sent to the mail server, and another receiving client is downloaded from the mail server(The most stable or 163,qq a bit not

Introduction to Basic concepts of e-maile-mail is used for online confidence delivery and communication, and it is one of the most important Internet services. According to statistics, 30% of the business of the Internet is email related. At the

Three points 1.SMTP Protocol 2. Build local mail server 3. Use external mail server to implement mail function 1.SMTP ProtocolThe SMTP (Simple Mail Transfer Protocol) is simply a mail Transfer protocol, a set of rules for sending

use of commonly used mailboxes (126, 163, QQ, Google, etc.): Enter mail, select the appropriate type of mailbox, as prompted to enter the relevant user name, password can be.Mailbox/Other mail accounts for specific domain names:Enter mail, choose

To send a message, you first have to figure out what the stack of different protocols are. The following paragraph refers to NetEase POP3 POP3 is the Post Office Protocol 3 abbreviation, the 3rd version of the Post Office Protocol, which provides a

1. Mail system role MUA (mail user agent), MTA (message transfer agent), MDA (Message Distribution Agent), MAA (mail access Agent) MUA: (Mail user agent): A user interface to an e-mail system, in most cases, a program that runs on a mail client.

POP3 POP3 is the post Office Protocol 3 abbreviation, the 3rd version of the Post Office Protocol, which provides a way to connect personal computers to the Internet's mail server and electronic protocols for downloading e-mail. It is the first

SendMail is the most important message transfer agent. SendMail as a free mail server software, has been widely used in a variety of servers, it in the stability, portability, and ensure that there is no bug has a certain characteristics, and can be

http://blog.csdn.net/bripengandre/article/details/2192111 POP3 Protocol Analysis     1th Chapter. POP3 Overview POP3 is all called the Post office Protocol Version3, the Post Office Protocol version 3rd. It is used by the user agent to get mail from

TCP/UDP Common port number 7 Echo (PING)9 DiscardDaytimer19 Word Fuzhou Builder20/TCP FTP Data21/TCP FTP Control File Transfer Protocol22/TCP SSH Secure Login, File transfer (SCP), and port redirection23/tcp Telnet Unsafe Text transfer25/tcp SMTP

1. Hardware knowledge1.1 nic? RoleModulation or reception of different signals via network card, modulation and demodulation of the number of corresponding signals in unit time? Type10M, 100M, 1000M100Mbps equal to 100M bit per second1.2 Network

https://blog.csdn.net/yulyu/article/details/69062288 Objective: Proficient in TCP/IP, familiar with Socket for network programming.See this sentence, there is no feeling very familiar ah. I believe many people have seen this request in the delivery

There are many kinds of mail servers, first we understand the protocol used in the mail transfer process. SMTP The SMTP (simple Mail Transfer Protocol) is simply a transport protocol, which is a set of rules for sending messages from source to

When people are full, they have to do something and think something. NetEase, billed as China's largest free mailbox provider, began a campaign called "Pop3,imap" to open the door and remove the ads at the bottom of the mail. For POP3 I have always