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.

The 3 Things To Avoid When Emailing Your List
When you decide to have an opt-in list, it is not just a matter of sending your subscribers your promotional newsletters or catalogs.