In the past months there have been instances where pfishing was used to get
account credentials and use the victim's account to send massive quantities
of SPAM.

Is there a way to configure postfix to detect such an event and/or to stop
such an event from reoccurring?
Is there a way to limit the number of email a person can sent in a short
period of time?
Is there a way to block sending an email if  a maximum number of recipients
is exceeded?

-- 
Robert Lopez
Unix Systems Administrator
Central New Mexico Community College (CNM)
525 Buena Vista SE
Albuquerque, New Mexico 87106

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