We currently run Exchange 2003 and we use a smarthost to send e-mail and a pop3 downloader to receive e-mail. We're also using GFI Mail Essentials and Trend Micro Scanmail as spam detection. We use AD and DNS on our internal network.
I really want to get rid of the pop3 downloader and smarthost. We're currently in the planning process of upgrading to Exchange 2007 (We'll go live after SP1). Here is my question.
What is the best way to set up an exchange 2007 server to send and receive e-mail without using a 3rd party resource?
Do i need to make any changes in DNS or anything like that? I already know about opening up port 25 on our firewall and setting the MX record for incoming e-mail. I just want to make sure i don't miss anything. I want to make sure that we stay secure and not allow any spam out of our network as I have no desire to be blacklisted. I have the option of using other servers, if i needed them.
Thanks for all the help. I really appreciate it.