{"id":181896,"date":"2026-06-04T14:48:10","date_gmt":"2026-06-04T12:48:10","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/fedora-linux-pomog-vyyavit-problemu-s-bezopasnostyu-v-pochtovom-kliente-outlook"},"modified":"2026-06-04T14:48:10","modified_gmt":"2026-06-04T12:48:10","slug":"fedora-linux-pomog-vyyavit-problemu-s-bezopasnostyu-v-pochtovom-kliente-outlook","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/fedora-linux-pomog-vyyavit-problemu-s-bezopasnostyu-v-pochtovom-kliente-outlook","title":{"rendered":"Fedora Linux half, ein Sicherheitsproblem im E-Mail-Client Outlook zu identifizieren.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Administratoren von Mailservern auf Basis von Fedora Linux haben Probleme mit dem Mail-Client Microsoft Outlook nach einem Update des Distributionsbetriebs bemerkt. Die Diagnose des Problems ergab, dass in der neuen Version des IMAP\/POP3-Servers Dovecot 2.4.3 die Authentifizierung \u00fcber die Protokolle IMAP und POP3 mit der \u00dcbertragung des Passworts im Klartext in unverschl\u00fcsselten Sitzungen standardm\u00e4\u00dfig deaktiviert wurde. <\/p>\n<p>Die Outlook-Nutzer hatten die Option aktiviert, um auf den Mailserver mit Verschl\u00fcsselung zuzugreifen, jedoch verwendete der Mail-Client beim Festlegen dieser Option weiterhin den Netzwerkport 110 f\u00fcr POP3, anstatt die Portnummer auf 995 zu \u00e4ndern, die f\u00fcr eine TLS-Sitzung zum POP3-Server verwendet wird, und nutzte nicht die STARTTLS-Erweiterung, um zu einer TLS-Sitzung zu wechseln. Einige \u00e4ltere Outlook-Konfigurationen ignorierten ohne Warnmeldung das TLS-Verschl\u00fcsselungsflag, wenn der Port 110 explizit angegeben wurde, und sendeten sofort die Kommandos USER und PASS im Klartext. Die \u00e4lteste Version von Microsoft Outlook, in der das Problem festgestellt wurde, datiert auf das Jahr 2007.<br \/>\n<br \/>Quelle: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65614\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0410\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u044b \u043f\u043e\u0447\u0442\u043e\u0432\u044b\u0445 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u043d\u0430 \u0431\u0430\u0437\u0435 Fedora Linux \u043e\u0431\u0440\u0430\u0442\u0438\u043b\u0438 \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u0435 \u043d\u0430 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441 \u0440\u0430\u0431\u043e\u0442\u043e\u0439 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u043a\u043b\u0438\u0435\u043d\u0442\u0430 Microsoft Outlook \u043f\u043e\u0441\u043b\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430. \u0414\u0438\u0430\u0433\u043d\u043e\u0441\u0442\u0438\u043a\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u043e\u043a\u0430\u0437\u0430\u043b\u0430, \u0447\u0442\u043e \u0432 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 \u0441 IMAP\/POP3-\u0441\u0435\u0440\u0432\u0435\u0440\u043e\u043c Dovecot 2.4.3 \u0432 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430\u0445 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0431\u044b\u043b\u0430 \u0437\u0430\u043f\u0440\u0435\u0449\u0435\u043d\u0430 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f \u043f\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430\u043c IMAP \u0438 POP3 \u0441 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0435\u0439 \u043f\u0430\u0440\u043e\u043b\u044f \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0432\u0438\u0434\u0435 \u0432 \u0441\u0435\u0430\u043d\u0441\u0430\u0445 \u0431\u0435\u0437 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-181896","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0410\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u044b \u043f\u043e\u0447\u0442\u043e\u0432\u044b\u0445 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u043d\u0430 \u0431\u0430\u0437\u0435 Fedora Linux 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im E-Mail-Client Outlook aufgedeckt | ProHoster","description":"Administrator:innen von Mailservern auf Basis von Fedora Linux haben festgestellt, dass es nach dem Update der Distribution zu Problemen mit dem E-Mail-Client Microsoft Outlook kommt. Die Fehlersuche ergab, dass in der neuen Version des IMAP\/POP3-Servers Dovecot 2.4.3 die Authentifizierung \u00fcber die Protokolle IMAP und POP3 in den Standardeinstellungen f\u00fcr unverschl\u00fcsselte Sitzungen deaktiviert wurde.","canonical_url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/fedora-linux-pomog-vyyavit-problemu-s-bezopasnostyu-v-pochtovom-kliente-outlook","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"de_DE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47Fedora Linux \u043f\u043e\u043c\u043e\u0433 \u0432\u044b\u044f\u0432\u0438\u0442\u044c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u0441 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u044c\u044e \u0432 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u043c \u043a\u043b\u0438\u0435\u043d\u0442\u0435 Outlook | ProHoster","og:description":"\u0410\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u044b \u043f\u043e\u0447\u0442\u043e\u0432\u044b\u0445 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u043d\u0430 \u0431\u0430\u0437\u0435 Fedora Linux \u043e\u0431\u0440\u0430\u0442\u0438\u043b\u0438 \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u0435 \u043d\u0430 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441 \u0440\u0430\u0431\u043e\u0442\u043e\u0439 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u043a\u043b\u0438\u0435\u043d\u0442\u0430 Microsoft Outlook \u043f\u043e\u0441\u043b\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430. \u0414\u0438\u0430\u0433\u043d\u043e\u0441\u0442\u0438\u043a\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u043e\u043a\u0430\u0437\u0430\u043b\u0430, \u0447\u0442\u043e \u0432 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 \u0441 IMAP\/POP3-\u0441\u0435\u0440\u0432\u0435\u0440\u043e\u043c Dovecot 2.4.3 \u0432 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430\u0445 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0431\u044b\u043b\u0430 \u0437\u0430\u043f\u0440\u0435\u0449\u0435\u043d\u0430 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f \u043f\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430\u043c IMAP \u0438 POP3 \u0441 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0435\u0439 \u043f\u0430\u0440\u043e\u043b\u044f \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0432\u0438\u0434\u0435 \u0432 \u0441\u0435\u0430\u043d\u0441\u0430\u0445 \u0431\u0435\u0437 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f","og:url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/fedora-linux-pomog-vyyavit-problemu-s-bezopasnostyu-v-pochtovom-kliente-outlook","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-06-04T12:48:10+00:00","article:modified_time":"2026-06-04T12:48:10+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/posts\/181896","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/comments?post=181896"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/posts\/181896\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/media?parent=181896"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/categories?post=181896"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/tags?post=181896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}