I attach port definition from wiki,
1-What is major different between SMTP, POP3, IMAP ?
2- What is major different between SMTP, SENDMAIL, PSOTIX ?
3-We always see the word of POP3 is sticked with IMAP, and
STMP is sticked with POSTIX and SENDMAIL, why those are so related ?
4-I know squirrelmail is toll to display email only, but why squirrelmail tools
will know to connect /home/mylogin/mail directory and the email folder ?
I try to copy the email in such directory, for example, support email folder
in /home/myloginmail to new folder such as supportnew but squirrel too
doesn't include supportnew folder. Why ? Whether POP3/IMAP
need to take care all setup for email folder directory so squirrel tools
will get it correctly. How to make sure the tool could also include supportnew
folder. I know I can do it in cpanel, but I had no longer to use it .
Those question reply is no need as research reports just a brief or idea to let me going into right direction but need a key word to explain it .
20 & 21: File Transfer Protocol (FTP)
22: Secure Shell (SSH)
23: Telnet remote login service
25: Simple Mail Transfer Protocol (SMTP)
53: Domain Name System (DNS) service
80: Hypertext Transfer Protocol (HTTP) used in the World Wide Web
110: Post Office Protocol (POP3)
119: Network News Transfer Protocol (NNTP)
143: Internet Message Access Protocol (IMAP)