{"id":4175,"date":"2020-10-30T20:02:00","date_gmt":"2020-10-30T19:02:00","guid":{"rendered":"https:\/\/webhosting.de\/postfix-certificate-verification-failed-for-gmail-smtp-in-l-google-com\/"},"modified":"2021-07-15T13:06:04","modified_gmt":"2021-07-15T12:06:04","slug":"postfix-certificate-verification-failed-for-gmail-smtp-in-l-google-com","status":"publish","type":"post","link":"https:\/\/webhosting.de\/pl\/postfix-certificate-verification-failed-for-gmail-smtp-in-l-google-com\/","title":{"rendered":"postfix: wychodz\u0105ce e-maile szyfrowane"},"content":{"rendered":"

Szyfrowanie komunikacji e-mailowej ma zawsze sens, zw\u0142aszcza gdy jeste\u015b w ruchu i uzyskujesz dost\u0119p lub piszesz wiadomo\u015bci e-mail w \u015brodowisku WLAN. Poniewa\u017c zazwyczaj czai si\u0119 tu nieznana osoba, kt\u00f3ra zapisuje komunikacj\u0119 w postaci zwyk\u0142ego tekstu.<\/p>\n

Za pomoc\u0105 prostych ustawie\u0144 w programie pocztowym lub smartfonie mo\u017cna aktywowa\u0107 szyfrowane po\u0142\u0105czenie. Tak wi\u0119c po\u0142\u0105czenie z programu pocztowego do serwera pocztowego jest szyfrowane i bezpieczne.<\/p>\n

Jednak po\u0142\u0105czenia pomi\u0119dzy serwerami pocztowymi nadawcy i odbiorcy s\u0105 wtedy problematyczne. Zazwyczaj s\u0105 one przesy\u0142ane w postaci niezaszyfrowanej, poniewa\u017c s\u0105 to serwery w bezpiecznym \u015brodowisku. Oczywi\u015bcie mo\u017cliwe jest wtedy kopiowanie i pods\u0142uchiwanie ruchu e-mailowego.<\/p>\n

Powiniene\u015b da\u0107 sw\u00f3j Postfix<\/a> serwery pocztowe daj\u0105 co najmniej mo\u017cliwo\u015b\u0107 korzystania z Dane<\/a> je\u015bli to mo\u017cliwe zaszyfrowane.<\/p>\n

Je\u015bli znajdziesz wpisy w swoim maillogu jak:<\/p>\n

weryfikacja certyfikatu nie powiod\u0142a si\u0119 dla gmail-smtp-in.l.google.com<\/h2>\n

Wtedy tw\u00f3j Postfix nie jest w stanie Certyfikat<\/a> w celu zaszyfrowania danych.<\/p>\n

Przy ma\u0142ej zmianie w pliku main.cf mo\u017cna to aktywowa\u0107.<\/p>\n

W tym celu ca-certyfikaty musz\u0105 by\u0107 zainstalowane na serwerze. Dla redhat\u00f3w i centos\u00f3w jest to opisane w opakowaniu ca-certyfikaty
\nPowi\u0105zane pliki mo\u017cna znale\u017a\u0107 tutaj: \/etc\/pki\/ca-trust\/extracted\/pem\/tls-ca-bundle.pem at centos7 Powiniene\u015b mie\u0107 sw\u00f3j w\u0142asny certyfikat i zapisa\u0107 go w \/etc\/postfix\/postfix_default.pem wraz z kluczem i g\u0142\u00f3wnym crt.<\/p>\n

Teraz wprowad\u017a te komendy:<\/p>\n

\npostconf -e smtp_tls_security_level=may\npostconf -e smtp_tls_cert_file=\/etc\/postfix\/postfix_default.pem\npostconf -e smtp_tls_key_file=\/etc\/postfix\/postfix_default.pem\npostconf -e smtp_tls_CAfile = \/etc\/pki\/ca-trust\/extracted\/pem\/tls-ca-bundle.pem\npostconf -e smtp_tls_mandatory_exclude_ciphers='aNULL, DES, RC4, MD5'.\n\npostconf -e smtpd_tls_security_level=may\npostconf -e smtpd_tls_key_file=\/etc\/postfix\/postfix_default.pem\npostconf -e smtpd_tls_cert_file=\/etc\/postfix\/postfix_default.pem\npostconf -e smtpd_tls_mandatory_protocols='!SSLv2, !SSLv3'\npostconf -e smtpd_tls_protocols='!SSLv2, !SSLv3'\npostconf -e smtpd_tls_mandatory_ciphers=high\npostconf -e smtpd_tls_mandatory_exclude_ciphers='aNULL, DES, RC4, MD5'.\npostconf -e tls_high_cipherlist='EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH:+CAMELLIA256:+AES256:+CAMELLIA128:+AES128:+SSLv3:!ANULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!ECDSA:CAMELLIA256-SHA:AES256-SHA:CAMELLIA128-SHA:AES128-SHA'.\n<\/pre>\n
Od teraz szyfruje postfixy na innych serwerach, kt\u00f3re to oferuj\u0105.<\/p>\n
Ale upewnij si\u0119, \u017ce opcje: <\/p>\n
Ta opcja jest reklamowana przez niekt\u00f3rych dostawc\u00f3w w reklamach telewizyjnych jako bezpieczna przesy\u0142ka e-mail. Nale\u017cy pami\u0119ta\u0107, \u017ce jest to oczywi\u015bcie tylko szyfrowanie transportowe, czyli \u015bcie\u017cka pomi\u0119dzy dwoma serwerami pocztowymi. Sama poczta jest ponownie zapisywana w zwyk\u0142ym tek\u015bcie na serwerze poczty elektronicznej odbiorcy.<\/p>","protected":false},"excerpt":{"rendered":"
Es ist immer sinnvoll die eMail Kommunikation zu verschl\u00fcsseln, gerade wenn man auch mobil unterwegs ist und in wlan Umgebungen eMails abruft oder schreibt. Denn hier lauert meist ein unbekannter, der die Kommunikation im Klartext mitschneidet. Mit simplen Einstellungen im eMailprogramm oder Smartphone kann man die Verschl\u00fcsselte Verbindung aktivieren. Somit ist die Verbindung vom eMailprogramm […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_crdt_document":"","inline_featured_image":false,"footnotes":""},"categories":[780,700,791,995,792],"tags":[],"class_list":["post-4175","post","type-post","status-publish","format-standard","hentry","category-administration-anleitungen","category-anleitungen","category-emailserver-administration-anleitungen","category-hilfe","category-postfix-emailserver-administration-anleitungen"],"acf":[],"_wp_attached_file":null,"_wp_attachment_metadata":null,"litespeed-optimize-size":null,"litespeed-optimize-set":null,"_elementor_source_image_hash":null,"_wp_attachment_image_alt":null,"stockpack_author_name":null,"stockpack_author_url":null,"stockpack_provider":null,"stockpack_image_url":null,"stockpack_license":null,"stockpack_license_url":null,"stockpack_modification":null,"color":null,"original_id":null,"original_url":null,"original_link":null,"unsplash_location":null,"unsplash_sponsor":null,"unsplash_exif":null,"unsplash_attachment_metadata":null,"_elementor_is_screenshot":null,"surfer_file_name":null,"surfer_file_original_url":null,"envato_tk_source_kit":null,"envato_tk_source_index":null,"envato_tk_manifest":null,"envato_tk_folder_name":null,"envato_tk_builder":null,"envato_elements_download_event":null,"_menu_item_type":null,"_menu_item_menu_item_parent":null,"_menu_item_object_id":null,"_menu_item_object":null,"_menu_item_target":null,"_menu_item_classes":null,"_menu_item_xfn":null,"_menu_item_url":null,"_trp_menu_languages":null,"rank_math_primary_category":null,"rank_math_title":null,"inline_featured_image":null,"_yoast_wpseo_primary_category":null,"rank_math_schema_blogposting":null,"rank_math_schema_videoobject":null,"_oembed_049c719bc4a9f89deaead66a7da9fddc":null,"_oembed_time_049c719bc4a9f89deaead66a7da9fddc":null,"_yoast_wpseo_focuskw":"","_yoast_wpseo_linkdex":null,"_oembed_27e3473bf8bec795fbeb3a9d38489348":null,"_oembed_c3b0f6959478faf92a1f343d8f96b19e":null,"_trp_translated_slug_en_us":null,"_wp_desired_post_slug":null,"_yoast_wpseo_title":null,"tldname":null,"tldpreis":null,"tldrubrik":null,"tldpolicylink":null,"tldsize":null,"tldregistrierungsdauer":null,"tldtransfer":null,"tldwhoisprivacy":null,"tldregistrarchange":null,"tldregistrantchange":null,"tldwhoisupdate":null,"tldnameserverupdate":null,"tlddeletesofort":null,"tlddeleteexpire":null,"tldumlaute":null,"tldrestore":null,"tldsubcategory":null,"tldbildname":null,"tldbildurl":null,"tldclean":null,"tldcategory":null,"tldpolicy":null,"tldbesonderheiten":null,"tld_bedeutung":null,"_oembed_d167040d816d8f94c072940c8009f5f8":null,"_oembed_b0a0fa59ef14f8870da2c63f2027d064":null,"_oembed_4792fa4dfb2a8f09ab950a73b7f313ba":null,"_oembed_33ceb1fe54a8ab775d9410abf699878d":null,"_oembed_fd7014d14d919b45ec004937c0db9335":null,"_oembed_21a029d076783ec3e8042698c351bd7e":null,"_oembed_be5ea8a0c7b18e658f08cc571a909452":null,"_oembed_a9ca7a298b19f9b48ec5914e010294d2":null,"_oembed_f8db6b27d08a2bb1f920e7647808899a":null,"_oembed_168ebde5096e77d8a89326519af9e022":null,"_oembed_cdb76f1b345b42743edfe25481b6f98f":null,"_oembed_87b0613611ae54e86e8864265404b0a1":null,"_oembed_27aa0e5cf3f1bb4bc416a4641a5ac273":null,"_oembed_time_27aa0e5cf3f1bb4bc416a4641a5ac273":null,"_tldname":null,"_tldclean":null,"_tldpreis":null,"_tldcategory":null,"_tldsubcategory":null,"_tldpolicy":null,"_tldpolicylink":null,"_tldsize":null,"_tldregistrierungsdauer":null,"_tldtransfer":null,"_tldwhoisprivacy":null,"_tldregistrarchange":null,"_tldregistrantchange":null,"_tldwhoisupdate":null,"_tldnameserverupdate":null,"_tlddeletesofort":null,"_tlddeleteexpire":null,"_tldumlaute":null,"_tldrestore":null,"_tldbildname":null,"_tldbildurl":null,"_tld_bedeutung":null,"_tldbesonderheiten":null,"_oembed_ad96e4112edb9f8ffa35731d4098bc6b":null,"_oembed_8357e2b8a2575c74ed5978f262a10126":null,"_oembed_3d5fea5103dd0d22ec5d6a33eff7f863":null,"_eael_widget_elements":null,"_oembed_0d8a206f09633e3d62b95a15a4dd0487":null,"_oembed_time_0d8a206f09633e3d62b95a15a4dd0487":null,"_aioseo_description":null,"_eb_attr":null,"_eb_data_table":null,"_oembed_819a879e7da16dd629cfd15a97334c8a":null,"_oembed_time_819a879e7da16dd629cfd15a97334c8a":null,"_acf_changed":null,"_wpcode_auto_insert":null,"_edit_last":null,"_edit_lock":null,"_oembed_e7b913c6c84084ed9702cb4feb012ddd":null,"_oembed_bfde9e10f59a17b85fc8917fa7edf782":null,"_oembed_time_bfde9e10f59a17b85fc8917fa7edf782":null,"_oembed_03514b67990db061d7c4672de26dc514":null,"_oembed_time_03514b67990db061d7c4672de26dc514":null,"rank_math_news_sitemap_robots":"index","rank_math_robots":["index"],"_eael_post_view_count":"4796","_trp_automatically_translated_slug_ru_ru":null,"_trp_automatically_translated_slug_et":"postfix-certificate-verification-failed-for-gmail-smtp-in-l-google-com","_trp_automatically_translated_slug_lv":"postfix-certificate-verification-failed-for-gmail-smtp-in-l-google-com","_trp_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