From: Sandy Drobic (postfix-usersjapantest.homelinux.com)
Date: Sat Jul 29 2006 - 11:53:14 CDT

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Magnus Bäck wrote:
> On Saturday, July 29, 2006 at 18:01 CEST,
> Claude Needham <gxxaxxgmail.com> wrote:
>
> [...]
>
>> Logically it makes more sense to put:
>>
>> reject_unauth_destination,
>> check_recipient_access hash:/etc/postfix/internal_only
>> reject_rbl_client relays.ordb.org,
>> reject_rbl_client list.dsbl.org,
>> reject_rbl_client sbl-xbl.spamhaus.org,
>>
>> But I have no clue how much overhead the check_recipient_access is.
>> And since all of the blacklisted stuff will be passing through this, I
>> just don't know.
>
> check_recipient_access has a significantly lower overhead than DNSBL
> lookups (at least with hash maps), so it would be a good idea to put
> it first. On the other hand, there will be very few cases where
> check_recipient_access results in a reject so in reality it doesn't
> matter.
>

As Magnus said, practically the only case where the order would matter,
is, when that address is heavily under attack by a spam or backscatter
storm. Otherwise you won't notice much difference.

Sandy

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