DMARC set to be v=DMARC1; p=reject; sp=reject;
For opendmarc.conf,set RejectFailures true
## RejectFailures { true | false }
## default "false"
##
## If set, messages will be rejected if they fail the DMARC evaluation, or
## temp-failed...
copy folder and all fiels from
/var/lib/pmg/templates
to
/etc/pmg/templates
Edit the files: /etc/pmg/templates/main.cf.in
at the smtpd_sender_restrictions part,
add below content:
check_sender_access regexp:/etc/postfix/Blocked_Sender_Domain...