Author: Peter Bowyer Date: To: Exim Users Mailing List Subject: Re: [exim] Experience with callout option?
On Wed, 26 Jan 2005 15:25:17 +0100, Toralf Lund <toralf@???> wrote: > I think I'll add a separate post for this question from one of my other
> threads:
>
> Any opinion on the callout checks, besides what's in the manual?
Recipient callouts: Essential if your architecture calls for them
Sender callouts: Good in limited circumstances, should not be deployed
across the board. Some sites welcome them, others consider them to be
abuse. There's a form of DDoS attack which uses callback-enabled sites
as a proxy.
