How to disable SSLv3 over SMTP port 25 on Postfix version 2.8.5 in Ubuntu?
References how to disable SSLv3 over SMTP port 25 on Postfix version 2.8.5 in Ubuntu.
Lines added to /etc/postfix/main.cf under #TLS Parameters section are as follows:
smtpd_tls_mandatory_protocols=!SSLv2,!SSLv3
smtp_tls_mandatory_protocols=!SSLv2,!SSLv3
smtpd_tls_protocols=!SSLv2,!SSLv3
smtp_tls_protocols=!SSLv2,!SSLv3
smtp_tls_security_level = may
smtp[d]_tls_security_level == "may"
smtpd_tls_security_level = may
smtp_tls_security_level = encrypt
smtp[d]_tls_security_level == "encrypt"
smtpd_tls_security_level == encrypt
smtp_tls_security_level = none
smtp[d]_tls_security_level == "none"
smtpd_tls_security_level == none
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