Edit: Gatekeeper is OSX technology. It allows users to only install Apple certified Apps on your mac, not your phone. It's fairly new and possible to turn it off (for now at least).
Of course this could be a really poorly working spam filter, but I'm inclined to believe this isn't the case.
There, fixed that for you.
It is illogical to block just this phrase and not the many others that would be far worse.
1) What's on their store, and
2) How apps get on your phone, e.g. they must be codesigned by Apple.
The former is where they apply their content standards. The latter is a (very effective) security measure.
But, for example, Apple doesn't care in the slightest if I make a hardcore pornography app, sign it with my own developer cert, and install it on my phone. They only care if I try and submit it to their store. Similarly, they don't care if I open up Safari and visit some pornographic website, even if it uses HTML5 offline mode and gets added as an independent icon to my home screen.
You don't know that. They don't know you've done this and they can't know you've done it, so how you do you if they care or not?
Apple has been pretty open about the fact that they just care about what's on their storefront. The only reason that this effectively means they control what's on your phone is because most people can't install apps on their phone except via Apple's App Store. Although, as usual, everyone in the world is free to view whatever objectionable website they want.
In contrast, deleting email based on content is neither inconsequential nor their own business.
I don't think this is at all like the ISP redirection pages that were more clearly non compliant with IETF internet standards.
Heh. Wonder how much of it is produced with iMovie, or FinalCut.
Unintended installs may be a type of exploit, but they're not synonymous with them, as 'aka' indicates. Gatekeeper does nothing to protect against, say, your browser being compromised remotely, as you can run unsigned code in a signed application. Gatekeeper raises the barrier to entry, but only slightly.
Because paranoia is so much more fun than rational thought.
Oh wait, they already did that: it's called iOS.
iOS is the ultimate proof that Apple does not intend to lock users out of their Macs: they already created a different product to enable that hand-held computing experience.
Please don't. Just right click and choose open. You will be able to open it, and whitelist the app in the process.
Let's not exaggerate. Everyone got by perfectly well for years and years just using common sense about what to install. Gatekeeper is a welcome layer of defense but I doubt many experienced users would be "hosed" without it.
As others have pointed out in this thread, gmail silently drops emails that contained zipped EXE files. It doesn't tell you it dropped it, it doesn't tell you it didn't send it, it just vanishes.
This is (sadly) not new behavior. Other email providers drop emails (which is sad), and Apple acting puritanical isn't exactly news.