After moving some GPG keys to a new computer I kept getting these trust warnings.

It is NOT certain that the key belongs to the person named
in the user ID.If you * really * know what you are doing,
you may answer the next question with yes.

Use this key anyway? (y/N)

To solve this one has to edit the key and set a trust level.

$ gpg--edit - key 't@coolsite.com'
trust
5

Source

• yanhan