Certificato<\/a> al fine di criptare i dati.<\/p>\nCon una piccola modifica nel file main.cf \u00e8 possibile attivarlo.<\/p>\n
A tal fine, i certificati ca devono essere installati sul server. Per redhat e centos questo \u00e8 descritto nel pacchetto ca-certificati
\nI file in bundle si trovano qui: \/etc\/pki\/ca-trust\/extracted\/pem\/tls-ca-bundle.pem at centos7 Si dovrebbe avere il proprio certificato e salvarlo in \/etc\/postfix\/postfix_default.pem insieme alla chiave e alla radice crt.<\/p>\n
Ora inserite questi comandi:<\/p>\n
\npostconf -e smtp_tls_security_level=pu\u00f2\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=pu\u00f2\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=alto\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:!RC4:!SEED:!ECDSA:CAMELLIA256-SHA:AES256-SHA:CAMELLIA128-SHA:AES128-SHA'\n<\/pre>\nD'ora in poi postfix cripta su altri server che offrono questo servizio.<\/p>\n
Ma assicuratevi che le opzioni: <\/p>\n
Questa opzione \u00e8 pubblicizzata da alcuni fornitori negli spot televisivi come una consegna sicura via e-mail. Si prega di notare che si tratta naturalmente solo di una cifratura di trasporto, cio\u00e8 il percorso tra i due server di posta. L'e-mail stessa viene nuovamente memorizzata in chiaro sul server di posta elettronica 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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