standard mail ports

One, what is the port. Before we start talking about ports, let's talk about what port is. Often heard on the network "My host opened a number of port, will not be invaded AH." "or" it would be safer to open that port. Again, my service should

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

Hadoop-definitions of Computer Network PortsPort Introduction The ports described in this article are all logical ports, which refer to the ports in the TCP/IP protocol. The port number ranges from 0 to 65535, for example, port 80 used to browse Web

1024 The following is reserved for the system, and from 1024-65535 is used by the userFor personal writing applications, try not to use a port number between 0 and 1024.1024 to 65535 we can program with. This is not a Linux rule, it is the socket

In network technology, port has two meanings: one is physical port, for example, ADSL modem, Hub, switch, router is used to connect other network equipment interface, such as RJ-45 port, SC port and so on. The second is the logical port, which

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

Hostmonster Web site programs generally cannot send mail because port 25 is blocked. Many ISPs block the use of port 25, which is used to send mail. They do this to reduce the amount of junk e-mail sent. All e-mails sent over the Internet are

Article Title: Linux networking entry (3): E-Mail server. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open

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

Small Q: a rain, a paper pad, leaning West Wind, but see right and wrong, empty looking back homeward bound, eventually not like as always.===========================================================Our commonly used e-mail protocols are