Thanks for your reply.
We are an Italian Telco/ISP company, so we offer outgoing SMTP service to our
customers.
For this service, we have always thought that the best way to pick up messages
from the queue, it is to do round-robin based on IP (or authenticated user if
used) of the sender, to obtain fairness based on the "customer" property of the
message.
Referring to the paragraph "How the entry selection works" of the article
SCHEDULER_README, I think it could be something like this:
foreach transport (round-robin-by-transport)
do
if transport busy continue
if transport process limit reached continue
#replace this with the row below: foreach transport's job (in the order of
the transport's job list)
foreach transport's job (round-robin by ip or auth-user)
do
foreach job's peer (round-robin-by-destination)
if peer->queue->concurrency < peer->queue->window
return next peer entry.
done
done
done
We have already adopted the same concept in our Mail To Fax service to obtain
fairness in the usage of "fax resources" (we do round-robin by customer).
We are very interested in obtaining such behaviour also for outgoing SMPT
service too. Is our request feasible? Which is the effort?
We are also willing to pay for this new feature (I'm not sure if this list is
the right place to ask for, let me know).
I'll wait for some decision.
Best regards
Giorgio Luchi
-----Messaggio originale-----
Da: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org]
Per conto di Wietse Venema
Inviato: venerdì 5 aprile 2013 15:02
A: Postfix users
Oggetto: Re: Scheduling policies for outgoing smtp server
Giorgio Luchi:
>I've read the article at "http://www.postfix.org/SCHEDULER_README.html
>The question is about a specific scenario to understand the behaviour
>of the scheduler:
- The scheduler makes decisions primarily based on destinations and
recipient email addresses; not on sender email addresses or
client IP addresses.
- The scheduler gives messages with fewer recipients some priority
over messages with more recipients.
- Otherwise, it delivers messages in approximate order of arrival.
Wietse
