Can Exchange be configured to retrieve mail from a hosted mail solution and still work effectively?

I have a new small business client that is using SBS 2003 w/ Exchange and getting mail to their domain from GoDaddy Hosting.  I have not completely investigated how their mail server is configured but what troubles me is that they local ISP (SureWest) is giving their firewall/router a "Dynamic IP" address and I'm wondering how the mail to their domain is finding its way from the Internet & GoDaddy back to their locally hosted Exchange Server with a Dynamic IP address.

I am not used to seeing this method of mail travel so I'm wondering:

Can Exchange be configured to pull mail from a hosted source and then sort and deliver that mail for multiple users for the local AD Domain?
ZillaTechAsked:
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Rajith EnchiparambilConnect With a Mentor Office 365 & Exchange ArchitectCommented:
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Rajith EnchiparambilOffice 365 & Exchange ArchitectCommented:
SBS 2003 can be configured to do that. Run the Email and Internet Config wizard and select the POP3 connector option.
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arcaexConnect With a Mentor Commented:
Yes. You can have mail go to a server offsite and then have the local exchange server 'POP' the mail to local accounts and then distribute them appropriately within your domain.

We currently do this at one of our customers sites and tell exchange to check for mail every 5 minutes. This provides some extra AV (Since their hoster scans the emails) and also is easier to setup if your not privy to MX records (They weren't at the time the previous IT guy set it up).

Also, even though they have a dynamic IP they could be using DynamicDNS which keeps DNS records updated if the ISP where to change your IP on you.
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ZillaTechAuthor Commented:
You mean "GoDaddy" might be using dynamic DNS?  I know they ordered and were assigned (3) static addresses by Surewest at one time but the router is showing a Dynamic Configuration.  I can ping their "mail.domain.com" and get an IP but when I look up that IP it shows "GoDaddy" owns it.
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Rajith EnchiparambilOffice 365 & Exchange ArchitectCommented:
Godaddy will have their own static ip address. You can use the POP3 connector to connect to them and get the emails.

You can also make Exchange handle emails, but you would need a static ip address to start with, as emails from dynamic ips are considered as spam by most of the isp/companies.
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