Difference between POP3 and exchange servers?

rather than me explain it
read this
http://support.contactually.com/customer/en/portal/articles/1051617-what-is-the-difference-between-imap-exchange-and-pop3-

SMTP does outgoing email !

Switch to POP3 instead of IMAP.
Here you can read what's the difference between POP3 and IMAP: Email Whats the Difference Between POP3 IMAP and Exchange

The problem is most likely that your phone is receiving email using POP3 rather then IMAP or an Exchange server. To solve this problem simply set up your email account using either the Exchange Server or IMAP option. You should note however that your email provider must support these in order for you to use them, in the event that they do not support them you have no option but to use POP3.

The address "pop-server.cfl.rr.com" appears to be a POP3 server (not Exchange or IMAP). See this help page from RoadRunner:
http://help.rr.com/HMSFaqs/e_emailserveraddys.aspx

For more on the differences between POP3 and IMAP, see:
http://www.office.mvps.org/glossary/pop_imap.html
http://www1.umn.edu/adcs/guides/email/imapvspop.html

There is a problem with how the POP3 connector processes certain
messages downloaded from a POP3 server. This problem could result in
the POP3 connector accidentally re-sending certain messages to
recipients who are not part of the SBS server e-mail domain.
This may happen only in the cases where the POP3 connector is used to
download mail from an external POP account. Customers using Exchange
to host their mail internally will not experience this problem. This
update resolves this issue.
All SBS customers are encouraged to install this update.

Update for Windows Small Business Server 2003: KB 835734
http://www.microsoft.com/downloads/details.aspx?FamilyId=7B1FF109-092E-4418-AA37-A53AF7B8F6FC&displaylang=en


Exchange Server Connector for POP3 Mailboxes deliver multiple copies
of messages
http://support.microsoft.com/default.aspx?scid=KB;EN-US;264249

By the sounds of it you are using Outlook 2007 or 2010
to download your email from sites like hotmail and Yahoo you need POP3 not Exchange. Exchange is a Microsoft Email server used by companies.

to remove the exchange section in outlook you need to go to the "Configuration Panel" then click on "Mail" in there you will have a profile called "Outlook" click on "Email acounts" and remove the item that says "Exchange" then click "Add " tick the box "Manually selct settings" select POP3 and add the details for your email as per their instructions

It looks as if your outlook is set to look for a Microsoft Exchange Server. If this is the case check the settings are correct.
If you are not using Exchange then you will need to change the server type to your POP3 mail server.

If you have problems post a reply.

you most likely have an error in your pop3 settings exchange server also suppport imap see if you can delete the outlook settings and then create a new connection using the correct pop 3 information or try imap ask your system admin what the imap settings are because pop 3 is no longer used as much

Ok, email can be setup using a bunch of different protocols. The difference is how directly you phones data and the data on the server interact. POP and IMAP are methods for receiving email from the server, to send they use a protocol called SMTP. With POP3, email is all downloaded to your phone and saved there, with IMAP you only download the headers (...a header is like the back cover of a book). An Exchange server can do SMTP with either POP or IMAP, but when it says configure for Exchange - it means actually connecting to the mail server and integrating contacts, calendar items, email, like the Outlook client on your Windows machine. This is obviously much more server intensive and requires special permissions to do.

POP and IMAP will require the following information to work. Your login name, your password, your server, and whether the connection is secure. To find these out you can go to your coporate webmail. The user name is what you put in the user login spot, as is the password, the server will usually be either mail followed by a dot and the second half of your email address, or the web URL for the mail server...if the web access page address starts "https" then the connection is most likely secure.

This link may help further...

unable to download from where a pop3 server or a exchange mailbox ....
If you are using a pop3 server ....u have to wait to download it....or may be the mail has been blocked due to the oversize limit....
Pls check with the system admin....whether there is a limit set by the admin.
cheers - Parveen