simple mail transfer protocol standard port 25

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

OSI Reference ModelOSI RM: Open Systems Interconnect Reference Model (open Systeminterconnection Reference Model)The OSI Reference model has the following advantages: Simplifies the related network operation; Provide

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

Windows Server 2003 building a mail serverBecause Windows Server 2003 defaults to not installing the POP3 and SMTP services we need to build our mail servers, we need to install them ourselves. Here's how:1. Place the Windows Server 2003 System CD

The history of email is longer than the web, until now, email is also a very broad application of the Internet services. Almost all programming languages support sending and receiving e-mail, but wait, before we start coding, it's important to

Keyword: VC ++ SMTP protocol Email Delivery analysis this article introduces a method to implement Email Delivery in a program using SMTP protocol specifications and using SMTP protocol commands directly. Some key implementation code is provided in

1. E-Mail SendingThe client is sent to the server side, and the Postfix software provides MTA,MDA. MTA provides SMTP service, accepts mail (reads DNS MX record)--"Save MDA transfer mail MUA user agent1-1 the server submits the e-mail message to TCP

Why is there a TCP/IP protocolAll over the world, a wide variety of computers run their own different operating systems for everyone, and these computers are used in many ways when expressing the same message. It is as if God in the Bible has

The TCP/IP protocol is actually a set of protocols, including many protocols, which constitute the TCP/IP protocol stack. But the Transmission Control Protocol (TCP) and the Internet Protocol (IP) are the most important of them, ensuring 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