external ISP requirements

5 pts.
Tags:
Exchange 2003
Internet service providers
Microsoft Exchange
Outlook
SBS
SBS 2003
We are running Exchange 2003 with SBS2003. Is it required to have seperate ISP accounts for each email address you have recieving external email? every staff member I have requeires external email communications, and from what I have been taught about Exchange you should be able to set it up so people email in to your server and the server auto directs to the exchange account. can someone help me understand how it all works... Thnaks Stacy
ASKED: May 28, 2008  10:47 PM
UPDATED: May 29, 2008  1:28 PM

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No each user does not need an email account on your ISPs mail server to use Exchange.

You will need the ISP to create an A-type DNS for the SBS host. Then they will need to create an MX-type record for the domain at which you need to receive inbound messages for. You will need to open your firewall to permit inbound & outbound SMTP (tcp port 25) traffic. Be sure to configure your SBS server to deny relay for all domains other than yours. Once you get through these steps, you should be able to send an inbound test message to a user on your server. If it gets rejected, you can look at the non-deliverable message and then begin troubleshooting the problem.

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