When an application requires a minimum perl module version which is not provided by installed RPM, it can be upgraded manually.
For instance, it is the case of amavis (see create a full and secured emails server), when upgrading some perl rpm packages (perl-CPAN for instance).
To upgrade CPAN perl module manually, opens a perl shell:
perl -MCPAN -e shell
Then request the "install" of the newest available perl module version. For instance: