Victor.Duchovnimorganstanley.com:
> To get high throughput via a content_filter that is low_latency (runs
> locally) but low concurrency (uses lots of CPU) one needs to avoid DNS
> lookups in the sending "smtp"

Are dns lookups performed by smtp even if supplied with IP address in its
destination address, e.g.: 'content_filter = scan:[127.0.0.1]:10024' ???

From Wietse:
| OK, what about updated examples that have no DNS lookup as well as
| "no virtual mapping" for pre-filter mail?

If anyone cares to comment on my updated README.postfix instructions
for the amavisd setup:

  http://www.ijs.si/software/amavisd/
  http://www.ijs.si/software/amavisd/README.postfix

It describes simple and more complex setups in a form of
a heavily comment chunk to be appended to the master.cf file.

It includes the "no virtual mapping" for pre-filter mail,
as well as Victor's suggestion about disable_dns_lookups=yes.

  Mark

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