On 1/12/2011 11:00 AM, Zhou, Yan wrote:
> Hi There, 
>
> With Postfix set up by default, it will send a bounce message to sender
> if it cannot deliver the message. But I can create SPAM message with
> some innocent sender address and send to Postfix. Then, the innocent
> sender will get undelivered email from Postfix. 
>
> How would I disable bounce without seeing messages still queued up in
> Postfix?  (I can disable bounce by commenting out entries in Master.cf,
> but messages are still queued up). 

Don't disable bounce.  It plays an important role.

> Even if we can solve the above problem without disable bounce, we still
> need to do that anyway. We are exchanging only-encrypted messages
> between sender & recipients, so the concept of bounce does not apply
> here. If we were to generate a bounce message, the bounce would have to
> be encrypted for recipient to know how to interpret it, I do not know
> Postfix generates bounce with encryption in it.
>
> So, the question is: how to disable bounce without invalid messages
> being queued up in Postfix?
>
First of all: Don't accept email for non-existent users.
An example of this discouraged practice is an empty relay_recipients_maps

Please provide evidence of your issue if you wish more help.
This includes 'postconf -n' output and sample log entries for a
transaction in question.

Brian

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