From: Alex Satrapa (alex.satrapaapf.edu.au)
Date: Wed May 31 2006 - 22:39:30 CDT

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On 1 Jun 2006, at 04:44, Esquivel, Vicente wrote:

> Is everyone running greylist on their main postfix gateway server
> or is
> everyone running greylisting on a separate individual server? What
> would be the pros and cons?

The only machines that it makes sense to run greylisting on are those
listed as MX servers for your domain (ie: where third parties will be
sending mail destined for your domain). Otherwise, the greylisting
will only be affecting transmission inside your network.

I implemented greylisting for our mail service, but spam slowed down.
The machines sending us spam just try again later (90% of the spam I
get comes from Microsoft Outlook, which is a "proper" mail sender).

Alex

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