Re: Email Graylisting

On 05.04.2013, at 14:34, Ashley Aitken <[email protected]> wrote:

>=20
> My question is: do people still use graylisting? =20


I use greylisting on my servers though these are not Mac based and not =
using the same greylisting implementation.  Been running it for years =
this way.   This is for a small email hosting service.

I use an implementation tied into spamassassin and exim that only =
greylists things that are suspected of being spam.  Other stuff comes =
right in.   I believe it also does not tie the greylist to the sending =
server, but rather according to sender name and message ID so that it =
does not matter if the sender switches servers.  Which avoids the =
problems listed by Markus.

I've had no known issues with my greylisting the way my system does it.  =
The only issues have been mail suspected as being spam, ie, in =
spamassassin.  But not with the greylisting aspects.   I whitelist known =
senders like banks (specific from addresses) and things that are known =
to cause issues on our systems.

Problems with greylisting are probably implementation specific.   If you =
have issues with the implementation, see if you can tweek some =
parameters.

btw, my greylisting service requires a min wait of 10 minutes.  Don't =
remember any issues with it.  If there have been, it was a long while =
ago.

Chad