{"id":159,"date":"2011-02-23T11:46:47","date_gmt":"2011-02-23T10:46:47","guid":{"rendered":"http:\/\/www.alvaromarin.com\/?p=159"},"modified":"2011-02-23T11:46:47","modified_gmt":"2011-02-23T10:46:47","slug":"greylisting-2010","status":"publish","type":"post","link":"http:\/\/www.alvaromarin.com\/2011\/02\/23\/greylisting-2010\/","title":{"rendered":"Greylisting 2010"},"content":{"rendered":"<p>En el mes de Mayo del pasado 2010, puse en marcha un nuevo <em>milter<\/em> en los relays de correo de entrada de <a href=\"http:\/\/www.hostalia.com\" target=\"_blank\">Hostalia<\/a>.<br \/>\nDicho <em>milter<\/em> se encarga de hacer <a href=\"http:\/\/www.greylisting.org\/\" target=\"_blank\">greylisting<\/a> selectivo a determinadas IPs (rangos din\u00e1micos, fundamentalmente) y el resultado ha sido ciertamente, muy efectivo.<\/p>\n<p>En el siguiente gr\u00e1fico, vemos como el n\u00famero de mensajes que se procesan por el motor antispam (en este punto, se han pasado ya todas las RBLs y tests SMTP, por lo que son mensajes que pasan a ser procesados por MailScanner y SpamAssassin) da un baj\u00f3n importante a partir de la puesta en marcha de dicho <em>milter<\/em>. <\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.alvaromarin.com\/images\/greylist.png\" alt=\"Greylisting\" width=\"504\" height=\"233\" \/><\/p>\n<p>Todo esto sin un solo falso positivo :-)<\/p>\n<p>Est\u00e1 claro, como el tiempo ha ido demostrando, que las formas de lucha contra el spam deben pasar por este tipo de soluciones. De hecho, habr\u00e1 que empezar a probar seriamente <a href=\"http:\/\/www.postfix.org\/postscreen.8.html\" target=\"_blank\">PostScreen<\/a>, una nueva funcionalidad que ya est\u00e1 presente en Postfix (a partir de su versi\u00f3n 2.8) y que permitir\u00e1 tener una protecci\u00f3n por delante del demonio <em>smtpd<\/em>. Prometo post sobre ello :-)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>En el mes de Mayo del pasado 2010, puse en marcha un nuevo milter en los relays de correo de entrada de Hostalia. Dicho milter se encarga de hacer greylisting selectivo a determinadas IPs (rangos din\u00e1micos, fundamentalmente) y el resultado &hellip; <a href=\"http:\/\/www.alvaromarin.com\/2011\/02\/23\/greylisting-2010\/\">Sigue leyendo <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4,5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Greylisting 2010 - www.alvaromarin.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.alvaromarin.com\/2011\/02\/23\/greylisting-2010\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Greylisting 2010 - www.alvaromarin.com\" \/>\n<meta property=\"og:description\" content=\"En el mes de Mayo del pasado 2010, puse en marcha un nuevo milter en los relays de correo de entrada de Hostalia. 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