Oh HELLLLLLLLL NOOOOOOOOOO!! 
Before I retired, there was a period a bunch of years ago where DHL had the government contract for shipping and we had to use that except for certain circumstances (like being able to use the next day delivery option by Fedex). Thank goodness when that contract was up, we could use anything else.
That type of contract was as bad as when the very first government credit cards for travel that we were issued were Diner's Club - something that barely an "modern" hotel or restaurant took. 
For my own personal deliveries from mail order, I have had some come from DHL and 
. Believe it or not, Fedex wasn't much better (they have gone downhill rather fast as their tracking is all over the place in terms of "expected delivery" ).
The best has so far been USPS and UPS, at least here where I live in Philly. 
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