It's on here because its not an issue with greylisting (afterall it IS working), but the overall Spamassassin process involved. I'm looking to optimize what I am doing with Spamassassin since I am seeing the greylisting stop catching the spam now...
Thanks for the input. I'm using: Postfix (I drop a ton of connections before the mail is even allowed in to my filters) - 6 RBLs - malformed email tests Spamassassin mimedefang razor2 dcc pyzor bayes lists Mailscanner - clamav/sophosav local whitelist/blacklist SPF (working on it anyway) Anyone had any luck with SPF checking? How about dkim? Am I missing anything that I can look at? Regards, Scott -----Original Message----- From: Chris Hoogendyk [mailto:[EMAIL PROTECTED] Sent: Thursday, April 24, 2008 11:27 AM To: SpamAssassin Users List Subject: Re: Oh ohh. grey listing starting to fail John Hardin wrote: > On Thu, 24 Apr 2008, SM wrote: > >> It's trivial for malware engines to retry. There isn't any queueing, >> as a standard MTA does, being done. This has been happening since >> some time. Greylisting only fails if you rely on it to stop spam. > > Greylisting, like any other antispam technique, blocks some portion of > the flood. There is no one magic silver bullet. > > It is still a useful tool. Greylisting only fails if you rely on it > *alone* to stop spam. yup. Interesting that this was posted on the spamassassin users list rather than on the milter-greylist users list. Suggestions that I've seen, but not yet tried myself, include using various dnsrbl's, using a longer greylisting period for certain types of sites to allow time for them to show up in the dnsrbl's, etc. In addition, we have started using a lot more of the filtering features on our mta (sendmail) directly, thus dropping lots of stuff before it ever reaches milter-greylist or spamassassin. The OP was using postfix, so someone else will have to provide suggestions there. I would suggest searching the milter-greylist archives and wiki and going to the postfix users list and wiki to see what options it may have. I've got a white board filled with the structure and all the pieces and interconnections of our mail system's software. Milter-greylist is in the upper right corner, just above mimedefang and spamassassin. Lots of other stuff going on. In a spam free world, I wouldn't need that white board -- think of it as a war room visual aid. --------------- Chris Hoogendyk - O__ ---- Systems Administrator c/ /'_ --- Biology & Geology Departments (*) \(*) -- 140 Morrill Science Center ~~~~~~~~~~ - University of Massachusetts, Amherst <[EMAIL PROTECTED]> --------------- Erdös 4 -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
