+smtp_tls_key_file="`postconf -h smtp_tls_key_file`"
+if [ -z "$smtp_tls_key_file" ]; then
+ postconf -e smtp_tls_key_file="\$smtp_tls_cert_file"
+fi
+smtpd_tls_key_file="`postconf -h smtpd_tls_key_file`"
+if [ -z "$smtpd_tls_key_file" ]; then
+ postconf -e smtpd_tls_key_file="\$smtpd_tls_cert_file"
+fi