It has happened to us all .. you dont want to bombard them with more emails that sound like spam but how should you reach out and try to remind them about your opportunity?
This article below has several great ways to achieve this - for several types of situations.
It is a great read
"To succeed in sales, you must walk a fine line between persistent and pushy. You don't want to give up too easily -- just because you don't get a response the first time you try doesn't mean the prospect isn't interested.
But you also don't want to annoy them -- sending 20 emails over the course of two weeks will turn an on-the-fence buyer into an uninterested one and will probably give your company a bad name.
With that in mind, how should you handle the buried email situation? "
Customer support service by UserEcho