About email URL uniform resource locator

Function of URL or Uniform Resource Locator
Without using an URL command for your email address, some
mail clients may not be able to translate it into an email address.

URL - Uniform Resource Locator protocol consist of some "Text" followed by the "colon" -- it is a communication protocol that tells a (ie: web-browser, email clients) program residing in a computer what to do.

Protocol a method of sending and receiving data.

URL protocol functions for mailto:

mailto: - Request for mail service protocol. Most of the time the standard email address formats work just fine (without the mailto: command) for those have have rich-text or HTML enabled mail clients, but to prevent virus from spreading, many corporations system delivers email as "text" only or are constrained by policy to disperse emails as text message.

Most people usually key-in only the email address, for example: support@mails.boradcast.com and some email clients have problems translating it into a dynamic address. Meaning that; without using the mailto: command, not everyone can click your the email address to launch their mail program and send you a message, as you intended it to be--meaning that; they have to manually start-up their email program and manually key-in your email address.

Therefore, by using the mailto: command, example: mailto:support@mails.broadcast.com it will be effectively translated as a dynamic email address by all mail clients.

mailto:		Request for mail service protocol
support		Email user ID name
@mailsbroadcast.com		Domain name linked to an IP address that emails can be sent to.

Command a request for mail service action sent to a mail client

User ID a unique address character string which identifies the user to whom the mail is to be sent.

IP address is numeric numbers that represents a location on the internet

Protocol a method of sending and receiving data.

URL protocol functions for HTTP:

HTTP (Hyper Text Transport Protocol) An URL is entered into a browser follows the "colon" and a string of text that ends with the hyper text markup language (HTML) extension to indicate the document itself.

Example:
http://www.mailsbroadcast.com/ecrm/archive.01.htm

http://		Starts hypertext markup protocol
www.mailsbroadcast.com		Server name, where the document is residing - www may be optional it depends on the hosting services or servers settings by their IT dept
ecrm		Directory where the file is located
archive.01.htm		The document itself

The browser program interpret it and asks DNS for the IP Address using the IP name in the URL, makes a TCP connection to port 80 of a remote host specified by the IP address, connect to the web server, send a GET command and the web server sends the webpage, the browser close the TCP connection and displays the webpage.

TCP/IP Transmission Control Protocol/Internet Protocol
creates a connection between sender and receiver using port numbers for a particular device.

IP Internet Protocol prepares a packet (datagram) for transmission across the Internet with the IP header encapsulated. The IP packet is then passed to the next layer where further network information is encapsulated onto it.

DNS is a distributed domain based naming system database that can be query to identify administers of an
IP address

Web server - A host that store web site and wait for a browser to opens a connection that request a specific page, it then send a copy of the requested item and closes the connection.

URL protocol functions for FTP:

FTP: File Transfer Protocol, are commands for software programs that let users transfer files across the Internet (upload or download files). The most common ways to access a FTP is through a "browser", an FTP program or by issuing FTP commands at a text-based command prompt.

Example:
ftp://www.mailsbroadcast.com/download/ebook.artofwar.exe

ftp://	Start File Transfer Protocol
www.mailsbroadcast.com	Name of server
download	Directory where the file is located
ebook.artofwar.exe	The file to be downloaded

URL protocol functions for file:

file: command protocol, (name of a file residing on a hard disk). Specifying a “file:” command for a file residing on your hard disk and when you insert the link into a web page, it will allow anyone to request the document from your hard drive.

Example:
file://c:/writeup/rfc821.txt

file:		Starts file specification protocol
c:/		Location of local disk drive
writeup		Name of directory
rfc821.txt		Name of the file

URL protocol functions for news:

news: command protocol. This function is used by many people to visit "UseNet" news group to read as well as to participate in posting at dejanews or news:alt.newbie

news:		To read news from a newsgroup
alt.newbie		The name of the newsgroup to be read

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