Configuring preferences and options in Outlook.com
You are correct. It should be contains.

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Is there any way to disable junk-mail/spam filtering completely in Outlook.com? I'd prefer my Windows client to handle this locally, thus everything I receive to my @outlook.com address should be going into Inbox.
Configuring preferences and options in Outlook.com
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You are correct. It should be contains.

I tell a lie... I'm actually still using the "sender email contains @" option, and it's still working for me:
I do still see the "has attachment" / "does not have an attachment" when I go to create a new rule though?
Yeah, there is a still a rule condition to check to see if there is an attachment, but there now isn't a corresponding one to check for lack of an attachment.
Honestly, I've simply gotten tired of fighting this for the last 6 years. As much as I hate to do it, I can't keep not getting my important email because Micro$uck really doesn't want to be in the free email business. And it is immediately and obviously apparent that they don't, given how they treat their customers like dog sh!t. I suspect the only reason they haven't shut it down is because Google has gmail, and heaven forbid Google should offer something that Micro$uck doesn't (even if MS is a total failure at it on the execution side due to lack of even minimal effort).
The worst part about it is that I'd be willing to pay a fee for a decent webmail system. Heck, I'd even be willing to buy an Outlook.com addin to manage mail (if one was offered, which it isn't - I checked). Guess I'll take a look at the slim pickings on paid email and figure out my next move. Though I dread the thought of it, I may even have to consider moving over to gmail, as much as I hate the thought of that. We'll see....
@EFJohnson - Really? M$ has removed the one capability that enabled circumvention of this absurd behavior? Is there no end to that company's idiocy?
But thanks for the forewarning: I'll keep my hands off the rule that I have in place.
Problem is that I don't now see a way to add that rule using the interface because they've removed the ability to check to see if an email doesn't have an attachment.
You are lucky that it still works for you, I guess -- just make sure you don't ever edit it or you'll be back in the same boat as the rest of us.