The Echelon system monitors international not intranational electronic communications. Echelon is supposed to detect espionage, but I have heard it has been misused for the benefit of the US, not the UK, economy.
The British government currently holds copies of emails for a set period and can only access them with a judicial warrant. It is not allowed to scan emails for keywords. Encryption is allowed in Britain, although you can be forced to reveal the key. I doubt encryption will be legal for much longer in Russia, considering the Russian government's totalitarian instincts.
The Russian email surveillance system is fundamentally flawed if it exists, (as the Russian government claims), to prevent organised crime and terrorism. This is because any gangster or terrorist can afford to use an ISP outside Russia, which means SORM2 can't monitor their communications. Also unlike law abiding civilians, they are likely to have the expertise and money to use military grade encryption software. This is why email surveillance is a nonsense, since anyone who really has something to hide will use effective methods to protect themselves, or they won't use such a fallible communication method in the first place.