Certificado<\/a> con el fin de encriptar los datos.<\/p>\nCon un peque\u00f1o cambio en el archivo main.cf puedes activarlo.<\/p>\n
Para ello, los certificados de CA deben ser instalados en el servidor. Para el sombrero rojo y los centos esto se describe en el paquete ca-certificados
\nLos archivos del paquete se pueden encontrar aqu\u00ed: \/etc\/pki\/ca-trust\/extracted\/pem\/tls-ca-bundle.pem en centos7 Deber\u00eda tener su propio certificado y guardarlo en \/etc\/postfix\/postfix_default.pem junto con la clave y la ra\u00edz crt.<\/p>\n
Ahora introduzca estos comandos:<\/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+CAMELIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH:+CAMELIA256:+AES256:+CAMELIA128:+AES128:+SSLv3:!aNULL:!eNULL:!BAJA:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEMILLA:!ECDSA:CAMELLIA256-SHA:AES256-SHA:CAMELLIA128-SHA:AES128-SHA'\n<\/pre>\nA partir de ahora postfix encripta a otros servidores que ofrecen esto.<\/p>\n
Pero aseg\u00farate de que las opciones: <\/p>\n
Esta opci\u00f3n es anunciada por algunos proveedores en anuncios de televisi\u00f3n como una entrega segura de correo electr\u00f3nico. Tenga en cuenta que esto es, por supuesto, s\u00f3lo una encriptaci\u00f3n de transporte, es decir, el camino entre los dos servidores de correo. El correo electr\u00f3nico en s\u00ed se almacena de nuevo en texto plano en el servidor de correo electr\u00f3nico del destinatario.<\/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 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