A similar issue was discussed recently in unicode problem with Email::Valid; McA has good information and tips in Re: unicode problem with Email::Valid. The short version: use Encode;, and then decode your data as MIME-Header (and encode the same way it when you'd like to go the other way). 

#!/usr/bin/perl

use feature qw/say/;
use warnings;
use strict;

use Encode;

say decode('MIME-Header', "=?iso-8859-1?Q?=C3=BC =C3=B6 =C3=A4?=");

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Output: 

$ perl test.pl
ü ö ä
$

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In reply to Re: need help in printing German umlauts by AppleFritter
in thread need help in printing German umlauts by opensourcer

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