Just some quick info....
There are new DHL services around that may be useful. You can drop off domestic (intra-German) parcels here:
Paketbox Gothaer Str. 1, Postbank-Finanzcenter, im 24h-Bereich 98527 Suhl
And if you are a registered Packstation user, there now is one in Suhl too where you can pick up your stuff:
Packstation 101 Schleusinger Str. 2, Deutsche Post Gebäude
Just thought it may be useful for some of you. :)