On Thursday, 8 June 2017 9:21:21 AM AEST Jerry Stuckle wrote: > On 6/8/2017 4:54 AM, Graeme Fowler via Exim-users wrote: > > On 7 Jun 2017, at 22:12, Jerry Stuckle <[email protected] <mailto:[email protected]>> wrote: > >> Yes, I understand that. But there isn't much I can do if the registrar > >> doesn't support the create date. That's why it returns -1 if the create > >> date cannot be found and the test is for 0 <= days <= 7. > > > > Aren't you just replicating the 'Day Old Bread' DNSBL here? > > > > Look at the check in SpamAssassin - URIBL_RHS_DOB. You could very likely > > just use a lookup type of dnsdb against that DNSBL instead of calling out > > to a script. > > > > Graeme > > Graeme, > > No, for two reasons. One is that it relies on an unreliable list - see > http://www.support-intelligence.com/dob/. Of course, it has been "in > beta" for years, but that doesn't mean it's reliable. I have disabled > it on our systems due to false positives in the past. > > The second is the list (if it worked) has a fixed five day range. This > test allows you to set the date range. > > Interestingly enough, mail logs show in the first five or so hours after > I implemented the change 33 emails were rejected. The last one was a > bit after 2300 UTC last night. We have had zero since that time. Most > days we would have had at least 50 overnight. Are the spammers actually > looking at rejections? Probably not rejections, but possibly slowness (e.g. https://serverfault.com/ questions/350023/tc-ingress-policing-and-ifb-mirroring to limit the rate they can send to 300 bit/s or something). > > One can only hope :) > > Jerry
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