RHEL7 Derivative Install RHEL8 Derivative Install RHEL9 Derivative Install Configuration Configuration Initial Configuration Certificates DKIM Secure QMT web administration SMTP opportunistic TLS: disable/force. *New* Spamdyke QRV Simscan Ramdisk Dovecot LDA (Sieve) Vpopmail Daemon Dspam PHP 5 to 7 PHP 7.4 to 8.1 Qmail Control Files End Qmail Manually Alias Domains Dspam PostgreSQL DB Mailing List