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Have a question on Exchange 5.5 and external e-mail

I am running Exchange 5.5 SP4, Win NT 4.0 Server SP6a, Clients are Win98 using Outlook 97 or 2000. I am using the Exchange Server for internal e-mail only. We have a seperate External e-mail ISP. A seperate router is responsible for external e-mail and internet access for the clients. My question is that when client send bulk or group external e-mail it is going through the exchange server and getting returned undeliverable. However when they send only one at a time it works fine. Is there a way that I can bypass the exchanger server and go directly out to the external e-mail ISP or is there a correction I need to make on the Exchange Server to alow bulk or group mailings?
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Nicholas Genovesi
Asked:
Nicholas Genovesi
1 Solution
 
rcmbCommented:
When you send bulk (e.g. distribution lists) email you use the Message Transfer Agent (MTA) of EX5.5. Because the MTA cannot resolve the addresses you are sending to you will get the mail returned. Have you verifed the MTA is running?

What I recommend is that you setup the Internet Mail Server and have your domain routed to inbound and then configure the IMS to have all email send to your ISP or DNS if you have DNS setup. This will ensure your users internal mail is routed internally in the server and then any email address that is unknown will be routed to the ISP.

RCMB
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Nicholas GenovesiSenior System AdministratorAuthor Commented:
I have IMS already set up for routing to inbound but I am not clear how you configure the IMS to have all e-mail sent to my ISP. Please explain. THANKS and yes the MTA is running
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