I received this SMS from DHL EXPRESS SCHWEIZ.
My first thought was Smishing.

Interesting attributes are the mention of „Mikchkasten“ but the XXX and lack of gap between the text and Sendungsnummer (plus why was it not mentioned where XXX is?) also triggered my spamsenses.

@dhlexpress you have to do better because it is not spam. I got notifications via WhatsApp and email too. But this kind of message is shoddy rubbish.