Description of problem:
Package doesn't properly provide ghost links to be a true 'alternatives' package for sendmail. This causes the problem that even if you configure opensmtpd to be active via the alternatives command, the package database has no listing of opensmtpd providing a /usr/bin/sendmail binary, so it will not satisfy that requirement for packages such as redhat-lsb or alpine.


Version-Release number of selected component (if applicable):
Probably all of them to-date, but this is the one I just tried:
opensmtpd-5.4.6p1

How reproducible:
Always

Additional info:
The specfile should have these lines added to the %files section:
%attr(0755,root,root) %ghost %{_sbindir}/sendmail
%attr(0755,root,root) %ghost %{_sbindir}/makemap
%attr(0755,root,root) %ghost %{_bindir}/mailq
%attr(0755,root,root) %ghost %{_bindir}/newaliases
%attr(0755,root,root) %ghost /usr/lib/sendmail