ATTENTIONATTENTION: Please make sure that you read /var/qmail/doc/PORT_NOTES. It contains important information about testing and configuring qmail, and finally replacing sendmail with qmail. You should also add /var/qmail/man to your MANPATH (see manpath(1) or login.conf(5)). Do not forget to read /var/qmail/doc/TLS.readme. After all, this is NOT our old stock qmail. ==> You can enable qmail as your default mailer: # this will disable the default MTA 1) do "make disable-sendmail" # enable qmail as your default MTA 2) do "make enable-qmail" ==> As you need to provide a working certificate in /var/qmail/control/cert.pem : # makes a self-signed certificate 3) do "make certificate" # makes a certificate request 4) do "make certificate-req"