Is e-mail marketing still relevant?

[zeus]

I noticed that some of the marketing practitioners are spamming this kind of marketing campaign through tons of email list in which usually ended in spam folder. It will be effective if you have established clients and users.

Yeah spamming that's kind of a big problem these days. People grow list organically through hard work and time, and then often loose it by email overflowing, getting greedy & offering too much to buy, having no personal engagement etc.