In The Netherlands recently hackers succeeded in getting a payment by sending
an email supposedly coming from a boss, who asked for settling an invoice. It
might have been unsuccessful if proper security measure were taken by
implementing email security features like DMARC and SPF, next to DKIM. To make
this more easy I find it highly desirable to have the packages opendmarc and
postfix-policyd-spf-perl available in a standard repository of openSUSE;
opendkim, next to DKIM support in Amavis, is already available.
These packages, architecture noarch,  are available o.a. in:
https://download.opensuse.org/repositories/devel:/languages:/perl/15.4/
https://download.opensuse.org/repositories/server:/mail/15.5/