what is pop3 protocol

SMTP (Simple Mail Transfer Protocol)The message transfer agent (mail Transfer AGENT,MTA) program uses the SMTP protocol to send e-mail to the recipient's mail server. The SMTP protocol can only be used to send messages and not to receive messages.

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

Original address: http://www.cnblogs.com/ForEvErNoME/archive/2012/06/05/2529259.html (with code download, bloggers are really ethical)1. Supplementary knowledge(1) What are POP3 and SMTP servers?Simply put: POP3 is used to receive e-mail, and SMTP

1. Supplementary knowledge(1) What are POP3 and SMTP servers?Simply put: POP3 is used to receive e-mail, and SMTP is used to send e-mail.(1) What does POP3 specifically refer to?POP3 (Post Office Protocol 3) is the 3rd version of the Post Office

Recognized ports are also known as common ports, with a port number of 0-1023, and they are tightly bound to special services and can no longer redefine his object. So Remote Desktop Connection can modify the port number. , Port 23rd Telnet Service

1. OSI, TCP/IP, five-layer protocol architectureOSI layering (layer 7) : Physical layer, Data link layer, network layer, transport layer, Session layer, presentation layer, application layer.TCP/IP tiering (layer 4) : Network interface layer,

SMTP (simple Mail Transfer Protocol)The mail delivery Agent (mail Transfer Agent,mta) program uses the SMTP protocol to send email to the Recipient's mail server. The SMTP protocol can only be used to send messages and cannot be used to receive

We know that PHP can send emails in two ways: one is the mail () function, and the other is the socket. For the first method, I will not introduce it much, because it is relatively simple to use, but there may be many things to be configured. For

Email5.0 code structure and email5.0 code structure Email5.0 code structure1 core interface IEmailService IEmailService is the core interface of Email. Defines the basic functions of Email. Such as sendmail, loadAttachment, sync, and searchMessages.

1. Install the corresponding compilation tool before installing nginxYum-y install GCC gcc-C ++ Autoconf automakeYum-y install zlib-devel OpenSSL-devel PCRE-devel Create an nginx GroupGroupadd-r nginxUseradd-S/sbin/nologin-G nginx-r nginxId nginx

First, the necessary software preparation1. Install PcreIn order to support the rewrite function, we need to install Pcre Copy Code code as follows: # yum Install pcre*/If you've already installed, please skip this step 2. Install

Well, into the main steps of this series of tutorials, the theoretical knowledge of the previous e-mail we all know, then this blog we will use the code to complete the delivery of the message. This is very widely used in real projects, such as

You can use the Python email module to deliver messages with attachments. SMTP (Simple Mail Transfer Protocol)The message transfer agent (mail Transfer AGENT,MTA) program uses the SMTP protocol to send e-mail to the recipient's mail server. The

SMTP (Simple Mail Transfer Protocol) The message transfer agent (mail Transfer AGENT,MTA) program uses the SMTP protocol to send e-mail to the recipient's mail server. The SMTP protocol can only be used to send messages and not to receive messages.

First, the basic knowledge cardingMUA (Mail User Agent)MUA is both a "mail user agent", because unless you can directly use software like Telnet to log in to the mail host, you will have to send mail to the email host through MUA. The most common

====================================== Related Software:1. Send email --- postfix 2. Identity Authentication --- sasl2 3. receive email --- dovecot 4. Anti-Virus email --- clamAV 5. Anti-Spam --- spamassassin 6. Control the virus and spam scanner --

Borland's C # Builder is a programming tool based on the C # language. C # Builder allows developers to develop it using Java or CORBA tools, C # Builder also has the ability to read data from a variety of databases, and can mix and adapt to

F. TransportThe transport class will be used when sending information. This class implements the message sending Protocol (SMTP). This class is an abstract class. We can use this class's Static Method Send () to send messages:Transport. Send

Learn about POP3 POP3 IntroductionPOP3 is short for Post Office Protocol-version 3. This Protocol is currently used by most email programs, the email client can log on to the email server to receive emails. POP3 is an offline Model Protocol. After

Introduction to the POP protocol (author: Chen Junqing October 18, 2000 11:53) This paper briefly describes the principle of receiving the decoding of mail and MIME messages through the POP3 protocol, and provides two useful PHP classes for the