POP3 stands for post office protocol. It is the most recent version of a standard protocol for receiving email.
pop3
Yes it is, I use POP3 through sbcglobal from Outlook Express and Linux's Thunderbird.
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POP3 and IMAP4
Yes, Charter is known for using an POP3 Email setup in their work. They even invite their customers to make an email through them and to contact them if they have questions or in need of help.
Yes, Gmail supports pop3. It also supports IMAP.
Barid.com offers Free IMAP and POP3, It is also in Arabic.
Yahoo's official website has troubleshooting pages that teach users about Pop3 issues. There are also online computer forums such as Droid Forums where people discuss Pop3 settings.
MSN account does not support POP3 or IMAP server. these accounts work with http server.
Mail.comcast.net
One can configure a pop3 anti-spam filter by registering for an online service such as Gmail or Yahoo. On these sites, they have anti-spam filters that can be used and are already configured for pop3 support.
The short answer is that IMAP can do everything that POP3 is capable of plus it allows you to create folders on our servers where your email is received and stored, as opposed to only on a client machine with POP3. Using IMAP, you create a single folder organization for storing your email, and any IMAP client (from any machine you use) will see that same structure. If you check email from several different machines, you see the same folder structure and messages from each machine. And, if you choose to have copies of your email on your home computer similar to POP3, IMAP allows you to synchronize your home computer with your email on our servers by pulling a copy of your email onto your local machine. Unlike POP3, your messages won't tend to get scattered among the various machines you use to check email.