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On Sun, 9 Feb 2014, Marcus Schopen wrote:
what would be a good way to implement rate-limiting for outbound mails
per sender e.g. 50 recipients per smtp_auth sender per hour?
I do this in filter_begin. There I detect the sender, assign a "SenderID"
based on different rules and query a SQL database about the sum of
recipients of this SenderID in the last hour & day. If the SMTP quota is
not exceeded, the tuple (scalar(@Recipients), SenderID, NOW()) as added to
the database.
I purge old entries daily.
- --
Steffen Kaiser
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