AFAIK DHL is a part of Deutsche Post now, and their Management is not real popular in Germany at this time, the reason being: they were involved in dodgy business practices, generally underpaying employees, and scrounging money where they could.
...as well as having a CEO getting caught cheating on taxes big time (not declaring the interest he earned on money secretly transfered to a numbers account in Liechenstein). This now ex-CEO got caught, together with hundreds others, after a former Liechtenstein bank employee sold a CD with hundreds of account files to German intelligence, who gave it to the tax office.
The German tax office also gave copies of this disk to other European countries, e.g. the UK and Ireland, so that they can prosecute their own tax evaders.