We use NCIPHER for our email encryption service from their Cloud platform (NEC). They were very easy to work with throughout the process - we needed some customisation along the way but they did this promptly and without fuss.The pricing is reasonable compared to other similar solutions so it wasn't an issue at all. I would recommend working closely with them when looking at options as there can be differences in how things will look and feel between different providers. Our main concern was that emails sent through our system could have end up being accessed by third parties if not encrypted properly; however, this has been addressed since switching over to NEC's solution.