[exim] Ratelimiting recipients per sender_address

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Author: Olaf Hopp (SCC)
Date:  
To: 'Mailing List'
Subject: [exim] Ratelimiting recipients per sender_address
Dear list,
we want to ratelimit incomming mail bursts (e.g. due
to phishing attacks).
To get an idea of reasonable values I have

   warn
      ratelimit = 100  / 60s / strict / $sender_address
      log_message =  RATELIMIT EXCEEDED for $sender_address $sender_rate messages / $sender_rate_period


But when the mail has two or more recipients this is also just counted as one mail

Is it somehow possible to configure a rate limit like

      "x recipients per distinct sender per time period y  > z" ?


Greetings, Olaf

--
Karlsruher Institut für Technologie (KIT)
Steinbuch Centre for Computing (SCC)

Dipl.-Geophys. Olaf Hopp

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