Buying an email list is strictly a no-no! As these email ids are not verified and not all are interested in your brand. The email list is of no use if your subscribers do not open your emails. If subscribers aren’t actively engaging with your emails or aren’t interested, your email campaigning efforts are redundant.

Combining Email Marketing with Other Types of Marketing
Whether you choose to do your marketing online or offline, one thing does not change. This is the concept that no single marketing strategy will be as effective as a combination of two or more marketing strategies.