From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: To: 9fans@9fans.net From: erik quanstrom Date: Tue, 13 May 2008 13:54:53 -0400 In-Reply-To: <0AE08E15-B397-4731-96D1-B83388C5CCEC@kix.in> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] /n/sources/patch/spamhaus Topicbox-Message-UUID: a6cd3db8-ead3-11e9-9d60-3106f5b1d025 > I use Greylisting [1], and it's been really effective. No false > positives (so far), and 0 to 2 spam messages a day. All this for a > mild ~15 minute delay on genuine emails (but only for the first time). sites like plan9.bell-labs.com tend not resend email with prec. bulk even when given a 45x error. smtpd 451'd a couple messages within the last week due to dns errors. the sender did not retry. i assume that they would have not been resent regardless of the text of the 451 message. i did run greylisting for several days. i found it cut down on spam only about 20%. those bots are getting smarter. - erik