We are getting a WinServer 2003 server and I need to come up with a system
for handling internal-only email. We currently have Internet email hosted
outside and have email clients setup to use their POP3 and SMTP servers. The
new email system will need to handle internal email separately as there are
users that don't have external email and we want to keep internal separated
with no Internet access for some users.

I know that I can install POP3 and SMTP as part of IIS with WinServer 2003.
Can I use this to handle email for about 150 users? The email client
(Mozilla) only has setup for a single SMTP server, so is there a way to
configure the email client to handle both internal and external email
accounts? Do I need anything else on the server for email, or will the
built-in services be sufficient?

--
Heather

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Excuse the newbie - I'm unfamiliar with mail servers and how POP3/SMTP
works, so sorry for confusing questions... :-)

The email client can handle multiple incoming POP3 accounts, but it only has
a setting for one SMTP server. So here's my confusion...

Let's say Joe currently has Internet email via the ISP's mail servers. His
email is joe@company.com and the POP3/SMTP servers are set to
mail.company.com. So now we add internal mail on a private IP with domain
name internal.corp and his internal email address is joe@internal.corp
(right?). So do we set the email client's SMTP to internal.corp, and if so,
how does he communicate with the outside world if he needs to send something
via Internet? If we set it to the external SMTP server it won't be able to
deliver back to our internal POP3 mail server since it's on a private network
(if I understand correctly).

I realize that this may sound like a strange setup, but the concept is that
Management doesn't want everybody to have Internet access or external email,
so I'm looking for some way to setup the Internet folks so they can use one
tool to communicate both directions. I could give them two separate email
clients configured differently, but it would be nice for them to get all
their mail in one place.


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Nope, just need email. I wasn't sure if something like Exchange was needed
to communicate with the mail server services or if the client software could
talk directly (told you I was new!). Further confusion comes from somebody
telling me that I wouldn't even need SMTP for internal-only communications
going to & from the same private domain... they said POP3 would handle the
whole shebang.

Sounds like this will work for what we need if I can just figure out how to
configure things. I'm sure it's something very simple, but being fresh to all
this I'm trying to figure out how the puzzle pieces fit together. Thanks for
your input and patience.

--
Heather

On Mon, 28 Feb 2005 07:59:01 -0800, "hkrause"
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Sure. Especially if they are already domain users anyway.

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Re-read what you said. Your client can handle one server and you're
asking if it can handle two. :)

Most clients can. But that's a client issue, not a server issue.

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Sufficient for what? You can send and retrieve mail if that's what
you're asking. No shared calendars, task lists, global address book
or the like that you get with Exchange and Outlook if you're looking
for those.

On Mon, 28 Feb 2005 12:43:05 -0800, "hkrause"
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True. You need to have connectivity between the sending SMTP and the
destination SMTP (POP is a mailbox protocol, SMTP actually sends and
receives the mail between systems).

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You still should be able to this with the correct client. I don't use
Mozilla, but other systems can use separate accounts.

An alternative is to use the internal SMTP for all mail, and relay
from it to an outside one for mail destined for outside. You'd need
to configure SMTP servers for this and it's not trivial.

An alternate mail server product may be better able to handle your
needs.

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No, POP is from the mailbox to client. SMTP accepts the mail and
hands it to the POP server. You might be able to handle this with
MAPI, but that's a whole 'nother area.

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Good luck, and ask questions as you go.