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Exchange 2007 rejects messages from senders with an invalid from address

Hi,

I have an SBS 2008 server with Exchange 2007.

recently our organisation made some changes to the website and email referrals from the website are now not coming through to the intended recipient in the organisation.

It looks like exchange might be rejecting the messages.I am using the pop3 connector to download messages. When I check on the pop3 server the message appears but the senders email address says "invalid address".

I don't know where it goes after exchange has downloaded the message but I think it gets rejected because the user does not receive the message.

So does the problem need to be resolved by the web developer so that the email being sent has a valid sender address or can the Exchange receive connectors be adjusted or reconfigured to accept these messages and not reject them.

If I do this does it mean I am exposing the server to accept more Spam messages.

Any help would be appreciated.

Thanks


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