I find the lack of spam/junk mail filtering in iOS a huge flaw in the system. I have rules set up on my Mac that say 'If subject contains this, then delete email' etc. While working at home I get no spam whatsoever. My server side filters are very strict and then Mail in OSX mops up any others that get through. It works great. On the iPhone however, even with the same email account, its a different story. When I'm out and about and obviously away from my Mac, my Mac is switched off. This obviously means that the extra level of spam protection is also off. As a result when out and about I start getting spam on my iPhone. Why is there no way to implement the same email filtering rules in OSX on iOS? It seems like an obvious thing to do. I know Apple rarely do the obvious but its a flaw that makes using the iPhone a bit of a pain in the ass. Why if we can sync, emails, settings preferences etc cant we sync a few simple rules? I dont want to run my Mac while I'm away just for spam protection on my iPhone. What are your thoughts?