I got an email from purism asking to confirm my order details. I answered that email from firstname.lastname@example.org and my mailer decided to encrypt that email because a public key was available for that adress. Strange thing: i got an answer back telling “I am not able to decrypt your email” which confuses me. A company especially like purism isn’t able to decrypt an email encrypted using their own key?
The answer contained as well a public key and asked me to use that key. I cannot find that key neither on their webside nor on the usual key servers. how can i trust that?