I'm aware that I owe you an email reply OP, sorry I have been busy and have stopped cold emailing customers.

Right now, I'm selling to retail / real estate (http://www.retailwizard.co.uk / http://www.propertywizard.io) so to get customers I literally go to their workplace & ask them for 5 minutes of their time. I did try emailing as you know, but I have found going to speak to to them face-to-face to be more effective for my niche.

Obviously email works for other sectors, something I'm looking to explore again in the future.