> I manage about 30 mail servers, all using greylisting for years (not

quoted text
> OpenBSD spamd, but a version running in the MTA). But as I greylist at

> RCPT TO, I only noticed the problem it when clamav did go down and the

> server was producing a 4xx error at DATA when it should have scanned the

> mail.

	I have definately seen issues here with other implemntations,

because the 4XX code given, the XX's matter...  Have you seen

this with OpenBSD spamd? (As opposed to something else..) 
>

quoted text
> Also, as an idea, I found it quite useful to whitelist only with a

> triplet (from, to, IP), and not just the IP. Why? Because some people

> are behind a firewall which allows them to go out with the same IP as

> their mail server (yes, IPs are expensive in Europe), so windows

> spamware is going out with the same IP than their mailserver and so

> bypasses the filter.

	I find this exceedingly unhelpful. as it makes the database

huge and does unnecessarily delay mail. Generally either a service

is reasonably well run, or it isn't. This also prevents the ease of

spamlogd pre-whitelisting stuff going out. 
	It sounds like you're speaking on this topic without

any actual experience with OpenBSD spamd, but rather something

like postfix or the sendmail-milter implementation.
	-Bob