Mail: Spam detection of unseen deleted messages

[SittingBull]

Scenario:

Mail is in training mode.

Mail is detecting in my remote mailbox a new message bigger than 10 kB in size (I've set this value in preferences intentionally).

Mail is asking me what to do with this new message: Cancel -- Delete -- Receive.

I'm clicking on Delete, because from the header I'm sure it's spam.

Question:

Will Mail -- while in training mode -- LEARN that this deleted unseen message is spam?

I think not.

I should receive this bloody long message and then label it "spam" (per "spam switch"). Or else Mail were unable to learn. Right?

Cheers.