What is a POP3 Mailbox

  What is a POP3 mailbox?
POP3 stands for 'Post Office Protocol 3' 
POP3 mailboxes reside on a POP3 server running specialised email software. The email in these mailboxes can be collected and downloaded to your PC by using a mail client (or mail program). Mail clients include Microsoft's Outlook, Outlook Express and Windows Mail in VISTA. The mail client uses POP3 to copy the mail from your POP3 mailbox to your PC. Once the mail has been downloaded you do not need to be connected to the internet while it is being read as the mail client will store the downloaded mail in it's Inbox on your PC.
Note: We regularly have users asking why they are not able to send email using POP3
The answer in short is... A POP3 mailbox stores email, but cannot send it - Email is sent using the SMTP Protocol which is a distinctly different mechanism.

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