Sample session:

C:\Documents and Settings\User>gpg -sea -r wilfred
gpg: 3AC0573E2D3482F3: There is no assurance this key belongs to the
named user

sub  rsa4096/3AC0573E2D3482F3 2017-10-25 Wilfred van Velzen


 Primary key fingerprint: D50E CD4F 514B 75DC 0A06  4F89 3BB3 7DA8 4A97 932B
      Subkey fingerprint: E2C3 89A4 BA14 0E9D 7ABF  E46D 3AC0 573E 2D34 82F3

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) y
will this work?
^D
^D

will this work?

--done
/quit
-exit
Arggghhhh!

What am I missing?

--- Thunderbird 2.0.0.24 (Windows/20100228)