Why do Facebook notifications always get sent to my Junk Email box in Outlook?

[parabellum]

Yes, yes I know, "where else would you expect to find them?" I hear you cry!
I have tried every option available to me to try to prevent this but nothing works, I have selected [email protected] as an acceptable sender and domain, I have put them as allowable in the junk mail options but nothing changes! Just wondering what I have missed, or is this an MS thing?
Sensible thoughts much appreciated.

[le Pingouin]

What Outlook is it? Desktop or the on-line version? Could it be your ISP labelling it spam in the headers?

[Avtrician]

Try looking in your security/junk settings.

I turned off the setting in FB to stop sending notifications..