Wietse:
> A more serious issue is that _destination_rate_delay is per-destination
> not per-sender, so the example that I gave was wrong to begin with.
> This would require a rate delay that is independent of destination.
In the case of single-recipient email, this can be done with delays
on the Postfix receiving side.
1) Force client concurrency of 1.
/etc/postfix/main.cf:
smtpd_client_connection_count_limit = 1
smtpd_client_event_limit_exceptions =
...hosts not subject to connection count limit...
2) Insert delays before receiving mail; s/client/sender/ if appropriate.
/etc/postfix/main.cf:
smtpd_client_restrictions =
check_client_access hash:/etc/postfix/client_access
/etc/postfix/client_access:
1.2.3.4 sleep 2
Wietse
