would setting mail server to not require authentication cause any impact on the security?
Also, the same client that experience this error, sometime can just sent email to me without any problem why is it ? I mean if it doesnt work, it should always doesnt work? but how come some time it works sometime its not.
thanks
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by: chokdiiPosted on 2009-09-29 at 21:01:54ID: 25455559
Some of your clients are set to authenticate while others are not.
Go into the exchange system manager and set your mail server to not require authentication and ensure that relay permission is granted to your internal networks whole IP range.