Hi,

I'm considering enabling the sender throttling functions in policyd, but
am a little unclear about how they work.  Having looked at the config file
and the readme, my understanding is that:

 - an entry is created in the throttle table which describes the number
   of messages / recipients / bytes / etc allowed per sender.  These
   entries can be created manually or automatically

 - domain records describe the same details, and are on a sum-total basis
   rather than functioning as a default from which to clone per-sender
   records for senders in that domain.  These records are only created
   manually

 - as messages pass through policyd these quotas are updated and messages
   accepted / rejected accordingly

A few points I'm unclear on:

 - If somebody sends two messages to the same recipient, their message
   count increases by 2, but does their recipient count increase by 1 or
   2 (ie is policyd keeping track of past recipients)?

 - If I manually put records in the throttle table, will they stay there
   indefinitely, or are they purged according to SENDER_INACTIVE_EXPIRE?

 - Is it possible to only maintain quotas for messages sent by local users
   and not incoming email to local users?

 - What's the purpose of the throttle_from_instance table?

 - What effect does whitelisting have on throttles?  Does a message that
   passes a whitelist get added to a sender's quota?

Thanks in advance,


-Ronan

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