On Wed, Feb 18, 2009 at 3:59 AM, Rocco Scappatura <rocco.scappat...@infracom.it> wrote:
> My aim, anyway, is to apply a such policy for outgoing messages > (including internal-to-internal messages). So I have to define a group > which contains the IPs enabled for relay through my mail server. smtpd_end_of_data_restrictions = check_policy_service inet:foo:12345 Postfix will send something like: request=smtpd_access_policy protocol_state=END-OF-MESSAGE protocol_name=ESMTP client_address=1.2.3.4 client_name=4.3.2.1.rfc1918.com reverse_client_name=4.3.2.1.rfc1918.com helo_name=[1.2.3.4] sender=sen...@example.com recipient...@domain.org recipient_count=1 instance=581.4821e789.60a46.0 size=500 etrn_domain= sasl_method=PLAIN sasl_username=sen...@example.com sasl_sender= ccert_subject= ccert_issuer= ccert_fingerprint= encryption_protocol= encryption_cipher= encryption_keysize=0 Take the "sasl_username", and use it as a key to lookup the number of messages sent in your homebrew database. Then add an entry with a count equal to "recipient_count". If the number < some pre-defined threshold within time period, then allow it. Otherwise reject it with some meaningful text.
