One thing I have seen having greylisting on all 3 of my production email servers (about 4 months now) is that it definatly stops a lot of spam, HOWEVER I am seeing time sensative stuff take crazy amounts of time to be delivered. I am seeing 1/2 hour as the average, not the 5 minutes we are hoping for, and in a few cases we have seen a message delivered literally DAYS later, which what I thought was against what the RFC's specify, but it's what's happening. I had to move 1 client OFF our main servers onto a reseller plan in order to accommodate getting them off of the greylisting.
Personally I get about 40 fewer spam messages a DAY because of greylisting and I am not willing to give it up just yet. Joey -----Original Message----- From: John Andersen [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 21, 2006 11:10 PM To: users@spamassassin.apache.org Subject: Re: Greylisting On Tuesday 21 November 2006 06:02, [EMAIL PROTECTED] wrote: > I'm afraid you're right on this one. > > Of course the spammers read this very list - and they have already > started to implement "anti greylisting" meassures... > > It's just a matter of time before they see too little success rate > when they read the bot stats and start to circumvent greylisting too > :( > > I have yet to try greylisting on a real production system. I am > concerned about the 5-15 mins. delay because we have some sensitive > customers that are already on their toes. But with the right set of > arguments I'm sure I can convince even the "worst" customer that greylisting is a good thing... > still. As I understand it, greylisting does not affect anything except the FIRST attempt. From there on, it goes through as fast as ever. Or am I wrong? -- _____________________________________ John Andersen
