Most company’s have in-house email lists. If you don’t, I strongly urge you to start building one. Email marketing is one of the key elements to the success (and support) of your overall marketing plan. There is even a saying that the success of a business can be down to the size of their mailing list…and to an extent I can agree. With such a small response rate on average, the more names you have the higher the amount of responses (all things equal of course).