> Ron Johnson wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> On 09/25/06 16:13, Peter Teunissen wrote: >> >>> On 25-sep-2006, at 22:55, Ron Johnson wrote: >>> >>> >>>> -----BEGIN PGP SIGNED MESSAGE----- >>>> Hash: SHA1 >>>> >>>> On 09/25/06 15:14, Paul E Condon wrote: >>>> >>>>> Over tha past few weeks, I have started receiving spam email that >>>>> contains text the is all well formed words, but doesn't make sense as >>>>> a spam message, or as any other sort of communication. I think I have >>>>> found what is going on: >>>>> >>>>> The email *does* contain a message. It is contained in a .gif or .png >>>>> or other image format file. These are not pictures of naked ladies, >>>>> but images of text that touts various penny stocks. If I didn't use >>>>> mutt, I might not have had so much puzzlement over them. I suppose >>>>> with Outlook all the user sees is the image, which is clearly spam, >>>>> but the user doesn't see what the spam filter sees, so, it seems, no >>>>> amount of filter fiddling will protect against this. What to do? Are >>>>> there new filtering techniques beyond spamassassin? >>>>> >>>> They are specifically designed to get around SA's traditional >>>> filtering process. Using sa-learn to train the Bayesian filter, >>>> along with the regular filters, helps a lot. >>>> >>>> >>> I've been NOT feeding them to sa-learn, since I thought they would mess >>> up spamassassins bayesian filter. If it trains itself on random >>> non-spam >>> words, couldn't it make the bayesian filter less effective or even >>> start >>> generating more false positives? >>> >> >> You'd think, wouldn't you. However, I've had no issues with false >> positives, even after setting the threshold down to 4.2. >> >> - -- >> Ron Johnson, Jr. >> Jefferson LA USA >> >> Is "common sense" really valid? >> For example, it is "common sense" to white-power racists that >> whites are superior to blacks, and that those with brown skins >> are mud people. >> However, that "common sense" is obviously wrong. >> -----BEGIN PGP SIGNATURE----- >> Version: GnuPG v1.4.5 (GNU/Linux) >> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org >> >> iD8DBQFFGHK0S9HxQb37XmcRAt9OAJ9Aot0XyOJ8wPVtFaYqcP/OArLDsACfcF3R >> sdMe7JFeBe1+Qgz40YwLNh8= >> =83zz >> -----END PGP SIGNATURE----- >> >> >> > There is the fuzzyocr plugin for spamassassin. It may be what you are > looking for. > > looks promising, but it involves installing stuff from either backports or testing. I'm a little reluctant to do so on my server. If I feel lucky, I might just give it a try. Anyone with some real life experiences?
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