From: Michael Orlitzky on
On 07/12/2010 10:58 AM, Victor Duchovni wrote:
> On Mon, Jul 12, 2010 at 03:17:49PM +0200, David Touzeau wrote:
>> smtp-amavis unix - - n - 7 smtp
>> -o smtp_data_done_timeout=1200
>> -o smtp_send_xforward_command=yes
>> -o disable_dns_lookups=yes
> I notice people still using "disable_dns_lookups=yes" long after the
> reason for doing so became moot.
> This setting is no longer necessary for content filters, and is rarely,
> if ever, necessary otherwise. It should be removed from HOWTO guides, ...

If you don't mind, why was it necessary, and why isn't it any longer?
I've still got it on my amavisd-new instance, and have long forgotten
where it came from.