See Sendmail Installation and Operation Guide (/usr/lpp/tcpip/samples/sendmail/sendmail.ps). Note that z/OS® sendmail does not use OpenSSL, but instead uses the Security Server SSL interface. Therefore, a flag confZOS_FILE is defined to indicate where this information is set. The default location is /etc/mail/zOS.cf. A sample zOS.cf file is shipped in /usr/lpp/tcpip/samples/sendmail/cf/zOS.cf. For more information on the SSL fields used in the zOS.cf file, see z/OS Cryptographic Services System SSL Programming. For an explanation of the fields within the zOS.cf file, see Creating the z/OS-specific file.