Postfix and TLS
Check for TLS Support in Postfix
By running this command you can verify that TLS is supported by your version of Postfix. Each of these parameters should exist.
# postconf -d | grep tls
lmtp_enforce_tls = no
lmtp_sasl_tls_security_options = $lmtp_sasl_security_options
lmtp_sasl_tls_verified_security_options = $lmtp_sasl_tls_security_options
lmtp_starttls_timeout = 300s
lmtp_tls_CAfile =
lmtp_tls_CApath =
lmtp_tls_cert_file ...
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Posted by mike 
