What is a POP3?

I'm trying to use Outlook Express to email an old friend, who I can't seem to contact through Yahoo mail. It says my POP3 isn't working, but I don't actually know what a POP3 is and what I am meant to do? What is a POP3? What am I supposed to enter as...

i have pop3 service on my mobile but i dont know how to use this always error comes that could not connect to pop3 server. i dont know whts adress of yahoo pop3server

I was on the internet and read about setting up your Outlook 2002 as a POP3 so as to import Hotmail messages into my Outlook 2002. So i did and it works but i CAN NOT send emails out, why is that? and what is POP3?

What is the difference between using POP3 and IMAP? What happens when i use IMAP and what happens when i use POP3 in OUTLOOK? Thank You~

My Microsoft Outlook Inbox has been dead for a while. I'm trying to set up my old account by restarting everything. I get to where I can choose types of email accounts and I click on POP3 server (what I had before). Then it asks for Incoming Mail Server...

I want to get incredimail onto my computer but am using hotmail. It says hotmail does not allow to use it onto incredimail so I need a pop3 account. Can I make an email in pop3 and then route emails from hotmail into there and also use incredimail while...

I have already tried below, but not able to receive mails... Incoming mail server (POP3): plus.pop.mail.yahoo.co.in & in more setting - advance - incoming server (POP3): 995... plz help

I'm using Mozilla Thunderbird and lately i've been confused about POP3 servers and stuff how can I find out yahoo mail's POP3 address.

Setting up microsoft office outlook, POP3, IMAP, HTTP? Well i'm trying to set up my email, and connect it with my yahoo email.. i'm just really clueless with the terms and all that stuff.. it ask me Account Type: POP3, IMAP, HTTP i have no idea which...