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CentOS 6.3 | SendMail 8.14.4

I'd like to throttle inbound emails to a specific address via sendmail. Is that possible? Ideally I'm looking for the opposite of greylisting: Accept the first email from a remote sender but defer future emails from that sender for X number of hours.

Update:

To further elaborate... I have an email address that is associated with an application. The application takes an incoming message and responds to the sender with a customized auto-response based on the incoming email content it receives. I want to make sure that this workflow is protected against accidental (or intentional) mass emails by allowing the first message and blocking/deferring future messages for a certain amount of time.

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I would do that programmatically using MIMEDefang and memcached –  adamo Apr 26 '13 at 8:02
    
Could you elaborate a little "WHY do you need it?"/"WHAT do you want to achieve?"? –  Andrzej A. Filip Apr 26 '13 at 9:55
    
Absolutely. I updated the question to hopefully describe the workflow better. –  Mike B Apr 26 '13 at 16:06
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