{"id":87,"date":"2009-04-24T07:46:44","date_gmt":"2009-04-24T06:46:44","guid":{"rendered":"http:\/\/www.alvaromarin.com\/?p=87"},"modified":"2009-04-24T09:29:32","modified_gmt":"2009-04-24T08:29:32","slug":"microsoft-usando-postfix","status":"publish","type":"post","link":"http:\/\/www.alvaromarin.com\/2009\/04\/24\/microsoft-usando-postfix\/","title":{"rendered":"Microsoft usando Postfix"},"content":{"rendered":"<p>Ayer hablando con un ex-compa\u00f1ero, Imanol, ya me lo dec\u00eda y justamente leyendo la lista de <em>postfix-users<\/em> sal\u00eda un mensaje que lo comentaba:<\/p>\n<pre>\r\n$ dig mx microsoft.com +short\r\n 10 mail.global.frontbridge.com.\r\n\r\n$ telnet mail.global.frontbridge.com 25\r\nTrying 65.55.88.22...\r\nConnected to mail.global.frontbridge.com.\r\nEscape character is '^]'.\r\n220 mail156-tx2.bigfish.com ESMTP Postfix EGGS and Butter\r\n<\/pre>\n<p>Y as\u00ed lo confirmaba el propio Victor Duchovni, que se podr\u00eda decir que es la mano derecha de <a href=\"http:\/\/www.porcupine.org\/wietse\/\" target=\"_blank\">Wietse Venema<\/a>, diciendo que <a href=\"http:\/\/www.microsoft.com\/spain\/interop\/news\/FrontBridge050831.mspx\" target=\"_blank\">Microsoft compr\u00f3 Frontbridge<\/a> hace tiempo y que \u00e9stos usaban por aqu\u00e9l entonces Postfix en su versi\u00f3n 1.1. Parece entonces que lo siguen usando y seguramente, Microsoft  tendr\u00e1 una primera frontera de servidores con Postfix para hacer frente a todo el tr\u00e1fico entrante, dada la excelente capacidad de este MTA de gestionar grandes cantidades de conexiones concurrentes como las que puede recibir Microsoft en sus MX.<\/p>\n<p>Como fijarse en el banner es algo banal, haciendo alguna prueba con comandos no existentes y dem\u00e1s, s\u00ed parece tener las respuestas de Postfix. Pasando <i>smtpscan<\/i> obtenemos:<\/p>\n<pre>\r\n$ \/usr\/local\/bin\/smtpscan  mail.global.frontbridge.com\r\nsmtpscan version 0.5\r\n\r\n  15 tests available\r\n  3184 fingerprints in the database\r\n\r\nScanning mail.global.frontbridge.com (216.32.180.22) port 25\r\n 15\/15\r\n\r\nResult --\r\n503:501:501:250:501:250:450:502:502:502:502:502:502:250:250\r\n\r\nBanner :\r\n220 mail153-va3.bigfish.com ESMTP Postfix EGGS and Butter\r\n\r\nNo exact match. Nearest matches :\r\n  - Postfix 1.1.11 (1)\r\n  - Postfix (1)\r\n<\/pre>\n<p>Que es justamente lo que dec\u00eda Viktor, un Postfix v1.1 modificado.<\/p>\n<p>Parece que esto coincide adem\u00e1s con el reciente lanzamiento de <a href=\"http:\/\/www.microsoft.com\/online\/exchange-hosted-services.mspx\" target=\"_blank\">Hosted Exchange<\/a>, algo que no ha sentado muy bien entre sus clientes ya que hacen clara competencia a sus <em>partners<\/em>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ayer hablando con un ex-compa\u00f1ero, Imanol, ya me lo dec\u00eda y justamente leyendo la lista de postfix-users sal\u00eda un mensaje que lo comentaba: $ dig mx microsoft.com +short 10 mail.global.frontbridge.com. $ telnet mail.global.frontbridge.com 25 Trying 65.55.88.22&#8230; Connected to mail.global.frontbridge.com. Escape &hellip; <a href=\"http:\/\/www.alvaromarin.com\/2009\/04\/24\/microsoft-usando-postfix\/\">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":[5],"tags":[77,34,58],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Microsoft usando Postfix - 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\/2009\/04\/24\/microsoft-usando-postfix\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Microsoft usando Postfix - www.alvaromarin.com\" \/>\n<meta property=\"og:description\" content=\"Ayer hablando con un ex-compa\u00f1ero, Imanol, ya me lo dec\u00eda y justamente leyendo la lista de postfix-users sal\u00eda un mensaje que lo comentaba: $ dig mx microsoft.com +short 10 mail.global.frontbridge.com. $ telnet mail.global.frontbridge.com 25 Trying 65.55.88.22... 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