On Fri, 14 Nov 2014 08:39:13 +0100 Matthias Leisi <matth...@leisi.net> wrote:
> On Fri, Nov 14, 2014 at 6:35 AM, John Hardin <jhar...@impsec.org> > wrote: > > if you're in a business environment you may have an uphill battle > > with managing expectations, to wit: email is *not* intended to be > > instant messaging - and may run up against the brick wall of > > management not being willing to delay emails from prospective new > > paying clients *at all*. > You can mitigate this risk somewhat by avoiding greylisting for a > certain set of whitelisted mailservers. You can also tremendously mitigate the risk by remembering when a given SMTP client passes the greylisting hurdle and avoiding greylisting it for the next few weeks. If it passes greylisting once, there's likely no point in greylisting it in the future. It's a sort of automatically-built greylist-whitelist. Regards, David.
