[Enigmail] Using a subkey for signing a public key

[Tobias Rapp]

Hello Michael,

> You can sign a message using a signing subkey (usage: S).
> There are no certification subkeys. For certification (signing others'
> keys), you need a certification key (usage: C), which can only be the
> primary key.

Ok, so the problem was caused by me when mixing up the terms "signing"
and "certification". Thanks for clarifying this.

> You will have to follow comment 3 in [1], and don't forget to feed the Orks!

Oops, if I would have scrolled down that page earlier I would have known
the answer...

/Tobias