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Exchange 5.5 Relay Problem

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I have discovered that our exchange server can be used as a relay host.
I have gone through the Technet article "Is Your Exchange Server Relay-Secure". However having done the suggested, anybody using MS Outlook Express client is unable to connect to the server.
Changing everyone to use full version of Outlook is out of the question due to cost and time factors.
Any help would be Appreciated!

6 replies

by antony_k

Go to Exchange Admin->IMS->Routing->Restrictions
there you can go different ways:
1.Check "Clients succesfully authenticate"
2.Check "Clients with these IP-addresses" and
type in IP and netmask
Then restart IMS.

Iam usually check how it works by telnet on 25th port.

by paull

Thanks for the info, however when I tried to implement the MS Outlook Express clients were not able to connect.
I am now trying to find out if there are extra config options for Express to allow it to connect when I set the server up as per your option 1.

Thanks for the help

by hutchingsp

I'm assuming you mean they can connect but can't send mail. In Outlook express goto the tools/accounts section and look at the properties of the account. On the servers tab tick the "My Server Requires Authentication" setting, you should be able to leave the settings section alone.

cheers
Paul

by paull

Thanks Paul
Your help and Anthony's above have saved my bacon.

Thanks heaps.

Shane

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