So we wanted to keep that but at the same time get rid of the pop/smtp accounts in Outlook. The advantage of having a hosted email though is if our internet connections are down for more than 2 days (smtp times out), we still have outside those emails being collected somewhere. Now, we have plans to make our exchange server a direct mail exchanger. Setting up OOF notification has to be done in 2 places also. It also makes our Blackberry users configuration difficult because you have to make sure their outlook clients are running (scheduled POP3 download) all the time to get the external emails synched with Exchange. As you can see, the email flow is complicated. Problem is also some of our local users don't have external email accounts. The problem is when you forward that email to a local Exchange user, it also has to use the smtp/pop3 account so it takes the longer route to the internet and back. So, if you received the email from outside, by default, you are going to reply to it using the smtp/pop3 account. Internet sender -> Hosted POP3 Server -> Local Recipient * Outlook uses the account used to receive the email to also reply or foward that email. Local Sender (forwarded/reply email from outside*) -> Hosted SMTP Server -> Local/Internet Recipient 4. Where possible I recommend choosing IMAP rather than POP3 - especially if you access your emails on multiple devices i.e. Local Sender (New email) -> Exchange Server (SMTP) -> Internet Recipient 3. Local Sender -> Exchange Server -> Local Recipient 2. Step 3 : Under accounts, touch Add Account. It is just that the external emails are hosted in the internet so the MX record points to that external server. This guide will walk you through the No-IP POP/IMAP mail setup on Apple iPhone. Our email clients in Outlook have 2 accounts configured - one for Exchange (local email) and one for POP3.
We have Exchange 2007 SP1 running on Windows 2003 Server.