So I'm waiting for an activation email to arrive, only to discover on logging in to spamgourmet that the email was eaten (top of my eaten log).
I've got a default number of messages set to 20 and no watchwords.
The new address was somehow not created (the name in the eaten message list is not a link).
I requested another activation message to that address, not arrived, not shown as eaten.
I sent a test message to that new address and received it.
now the eaten log shows a link, but the address list only shows that one message was sent, with 0 eaten.