What is POP3?
POP3 is the acronym for Post Office Protocol Version 3 which defines a
method for mail retrieval.
POP3 clients will require 4 essential pieces of information in order to
work, namely:
- Incoming mail (POP3) server: pop.nus.edu.sg
- Outgoing mail (SMTP) server: smtp.nus.edu.sg
- Mail server user name: your Exchange user name
- Outgoing mail server user name: your Exchange user name
For example, a staff of Computer Centre will
have the following settings:
- Incoming mail (POP3) server: pop.nus.edu.sg
- Outgoing mail (SMTP) server: smtp.nus.edu.sg
- Mail server user name: ccetankh
- Outgoing mail server user name: ccetankh
POP3 allows you to either
- Leave messages on the server - this keeps a copy of your mail
on the server so you can access your mail from any client that connects to
the server
- Remove messages from server - this downloads your mail to the
local hard disk where your client resides and deletes the messages from
the server. This will clear up your disk space on the server. Note that
for this option the messages are not accessible from anywhere else except
your local hard disk.
Limitations of POP3
- Messages are not accessible from another client once they are
downloaded to the local hard disk, therefore it is ideal when only one
workstation is used for mail retrieval.
- Not able to manage folders other than the Inbox folder
- Not able to transfer only selected parts of a message (e.g. the text
portion of a multimedia mail message)
Configuration of POP3 clients
Click on the links below for configuration instructions for
various POP3 clients:
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