There's no such thing as a totally secure email account, in the same way that there's no such thing as a totally secure car, or house, or anything else.
The question you need to ask yourself is 'why would anyone be interested in hacking into my email account?' The answer is that it's extremely unlikely that anyone would.
If you want to remain fairly anonymous when you register in web forums just provide a hotmail address. Nobody's going to be interested in hacking it.