Slide your finger from left to right over the email, a delete button should show up.
tcp is more reliable than udp,udp may have failures or data loss, so we can't afford to have losses in http,smtp,pop3 and so on.Accurate data is very important is all this protocols
ImprovementThe above answer being true, it is worth mentioning that none of the Protocols in your question actually require TCP as its Transport protocol. They simply require the use of a reliable protocol at the Transport Layer (refer ISO::OSI network model) and TCP is the best there is right now.And also, since these protocols were developed after the reign of TCP as the primary transport protocol started, integrating them with TCP is relatively easier. If used with other protocols, it has to be explicitly configured into the App protocols.
Regards
Binaek Sarkar
Foundation
http://www.foundation.net.in/
It depends on the quality of the video you are trying to watch. Higher quality = longer load times and more demand on your connection. I find you need about 250 kbps of download speed on a computer not running too much to watch the worst quality youtube videos 240p without having to buffer too much.
Many email systems can now be accessed using only a Web browser. There is no need to install client email software of any kind. Logically, Web browser interfaces to email are like IMAP, in that all the messages remain on the server unless explicitly deleted. (Message copies can be saved on the client computer.)
Along with POP3, IMAP is one of two prevailing electronic mail protocols. IMAP is an acronym for Internet Message Access Protocol. It is is an Application Layer Internet protocol, meaning that it allows an e-mail client application to access electronic mail on a remote mail server.
IMAP differs from the other prevailing e-mail protocol, POP3, in that the client's e-mail is retained in a set of private message directories on the IMAP mail server itself. This allows messages to be easily synchronized across multiple e-mail clients on multiple devices. POP3 protocol delivers messages to the client application for storage on the client device. Messages are subsequently deleted from the POP3 server, making synchronization of multiple devices more difficult.
POP3 was the preferred e-mail protocol when server power and storage capacity were at a premium, and before the rise of ubiquitous Internet-enabled mobile devices. More recently, IMAP has supplanted POP3 as the most predominant e-mail protocol.
All web-mail services (GMail, Yahoo Mail, Hotmail, etc.) are based on IMAP. Microsoft Exchange is also a form of IMAP. Today, nearly all Internet and private electronic mail servers support IMAP.
Here is a basic run down.
The Post Office Protocol - Version 3 (POP3) is intended to permit a workstation to dynamically access a maildrop on a server host in a useful fashion. Usually, this means that the POP3 protocol is used to allow a workstation to retrieve mail that the server is holding for it.
POP3 is not intended to provide extensive manipulation operations of mail on the server; normally, mail is downloaded and then deleted. A more advanced (and complex) protocol, IMAP4, is discussed in [RFC1730].
AnswerA POP mail server (or simply "POP server") is the most common form of incoming email server. Basically, the POP server is what receives the email and is almost always used with an SMTP server, which is the outgoing server. The best way to find out the address of your POP server is to ask the company who is providing your email service. You will need to know this information if you are planning to set up an email client such as Thunderbird, Outlook, or Eudora to access your email. AnswerPOP (Post Office Protocol) mail client programs (e.g., Eudora, Netscape Communicator, Microsoft Exchange, Microsoft Outlook) allow you to retrieve your e-mail from the central server to your local computer. When someone sends you an e-mail message, the message is received, processed and stored in your mail file on the central mail server (for most this is slate).You can access your e-mail: 1) locally by logging onto the mail server and using a mail client program (e.g., "pine" or "elm"); or 2) remotely by using a POP/IMAP client program. With a POP client your e-mail is copied/retrieved from the mail server to a local computer. With an IMAP client your e-mail is accessible remotely, but is stored and managed on the server. (A subset of POP e-mail client programs also function as IMAP clients. The advantages and disadvantages of POP vs IMAP are discussed in the "Electronic Mail Quick Reference" guide. IMAP configuration is discussed in the "IMAP Quick Reference" guide.)
The Internet Message Access Port is commonly assigned to port numbers 143 and 993. If one has access rights to their email server, they can manually change their IMAP port numbers there.
The major advantage is that, IMAP shows you a copy of the email you receive unlike POP where the email you receive is being downloaded to your computer first and deleting the copy on the server.(POP is usually being used in stand-alone email client software like Thunderbird) So you see, if accidentally something terrific happens to your computer and you will have no option other than formatting and reinstalling your Operating System, you will loose the emails. But the stand-alone email clients will ask whether you want to download only a copy of the emails you receive preserving the original mail on the server.
While there is no real right way to prevent SPAM (while still receiving your good e-mail), the two tactics that I do/have used seem to be effect for me are:
There are a number of email providers in India. You will need to see what is available in your area and match what they offer with what will fit your needs.
It's probably in the php.ini file, you can also have a look at the current configuration of your PHP by running a file on the webserver with the following code:
<?php
phpinfo();
?>
goodluck