You just need to escape it

E.g.

print <<"FOO";
    =head2 $fnName( )

    =over 4

    =item Parameters:

    None

    =item Description:

            Display backup status.

    =item Returns:

            \%{\$outputParams{PAYLOAD}}; DFM Database related attribut
+es
            $outputParams{TIMETAKEN}; Time taken to run a CLI at Serve
+r
            $outputParams{CMDSTATUS}; Status returned by the command e
+xecuted
            $outputParams{CMDOUTPUT}; Output returned by the command e
+xecuted


    =back

    =cut

    # ================================================================
+===========

FOO
[download]

see the