Outlook spam filter more obnoxious than spam

I realise that Outlook is a goldmine of bad UI, but the other day I was presented with this dialog that I don’t remember seeing before.

Outlook_ui_makes_spam_more_obstructive_than_regular_mail

That’s right. When Outlook thinks it has received some spam, it presents the user with a modal dialog to tell them about it.

Thanks, Microsoft. I’m glad you warned me. I could have been annoyed by that email if you hadn’t interrupted what I was doing to tell me about it.