Pop3 is used to retrieve email only. If they need to send email, they will have to also use smtp protocol.
Main Topics
Browse All TopicsWhere is the incoming and outgoing pop3 server information stored in Exchange 2003 so I can give it to my users or help them configure their pop3 accounts.
This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.
Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.
If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.
Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.
Access the answers to your technology questions today.
30-day free trial. Register in 60 seconds.
Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Try it out and discover for yourself.
30-day free trial. Register in 60 seconds.
Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.
your pop3 and smtp should be available on an outside ip address...provided everything is setup correctly.
Whatever that outside ip address is....is the pop3 server you plug into outlook...same for smtp.
don't know your ip ? - goto > www.whatismyip.com ...from the server
example setup.... exchange server listening on an inside interface...like 192.168.100.2 ....your router or firewall if you have one...would redirect port 110(pop3) and 25(smtp) from outside ip 204.231.13.xxx to the internal address.
OH -- if you are looking for your MX records, just go to www.dnstools.com and enter the outside name
If your are configuring clients attached to your Local Area Network Then the POP3 and the SMTP Servers should be set at the local IP Address of the Exchange Server, eg 192.168.0.1
However if your are trying to connect to your Exchange Server from outside of your network via the internet, this is a different matter. There are two different scenarios: one is that your Exchange Server has a second network card or a modem with a public IP Address, the second is that you have a NAT enabled internet connection using a router/firewall.
In the first scenario the POP3 Server will be the public IP Address of your Server, the SMTP is a little more tricky. By default you will only be able to use your Exchange Servers SMTP server to send email to addresses within your domain so as not to act as a relay. You can open up your SMTP Server to allow connections from anywhere to anywhere but this is not recommended. I would recommend you use the SMTP server provided by the remote users ISP, eg post.demon.co.uk if using Demon Internet. The second scenario is the same principal, however you will have to forward ports 110(POP3) and 25)SMTP from your router/firewall to the Exchange Server.
It would be useful if you could let me know your exact setup
Business Accounts
Answer for Membership
by: lazarus98Posted on 2005-08-31 at 06:08:33ID: 14793245
Microsoft Exchange System Mananger -> Administrative Groups -> First Administrative Group -> Protocols -> Pop3 -> Defualt Pop3 Vitual Server -> (Right Click) Properties