On Mon, Dec 17, 2012 at 10:46:32AM +0100, Victor d'Agostino wrote:
> Our postfix server serves several internal domains and relays outgoing
> traffic through our ISP SMTP relay server. This external SMTP server is
> limited to 3 destination domains at the same time.

A SMTP relay must accept at least 100 recipients in one transaction. And
it must reject any above its limit gracefully with a _temporary_ error.

> I am wondering if it is possible to set a destination_concurrency_limit of
> 3 to the relayhost SMTP server *only* and use the default limit for others
> SMTP servers.

You can specify anything you want for the different smtp clients
specified in master.cf.

Bastian

-- 
Each kiss is as the first.
                -- Miramanee, Kirk's wife, "The Paradise Syndrome",
                   stardate 4842.6

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