On Feb 19, 2009, at 11:44 AM, Santiago Romero <srom...@servicom2000.com> wrote:


Hi.

I have a postfix mailserver working as a secondary MX of a domain (let's call it "domain.com"). The primary MX is a qmail+antivir +antispam server that has serious memory/cpu problems to process all the email (the one which receives by itself and the email that I sent to it).

Is there any way to slow down the mx2 -> mx1 connection concurrence/ message ratio only for a given domain or for a single remote mail server? I just want to limit as much as possible the mail concurrency from my server to a given remote server to avoid affecting its performance.

I've read in the documentation about "*_destination_concurrency_limit", but they seem "global" parameters. I just want to act over a single remote domain or server hostname/ip.

The destination_concurrency_limit and rate_delay parameters can be configured per transport. You could configure a transport map to route all mail destined to domain.com via the example: transport, which can be configured as a clone of the smtp transport in master.cf. Then, specify concurrency and other limits/delays for only that transport in main.cf.

--
Sahil Tandon

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