I have generated a pgp code with both Igolder and Kleopatra/GPA, GPA gave me the option to sign the PGP code, while Igolder does not. DHL asks for my PGP signature which I am not sure how to find via either software. Therefore I am unable to communicate with vendors. Please help if you can I've search extensively for an answer.
I may be totally off but I'm assuming DHL just wants your public key. You can go into settings on GPA and export your key then paste it onto DHL