I am always happy to answer questions via email. But, you might not always receive a prompt reply. This can be due to many reasons: how many emails I receive that day (can be 30 or 40) and therefore how far down the page your email sits, how busy I am at work or after hours, how interesting your email is, how many questions you ask and how much time I need to spend thinking or typing to give you an appropriate reply.
If I don’t answer don’t be afraid to resend. I’m not trying to be rude. The answer you receive may be brief and rather to the point, which is generally just a time saving device on my behalf.