I am email blast lists for suppliers. I pretty much don’t have a choice if I want to keep up with new products and dated promos that I can suggest to my customers. But it is a royal PITA keeping up with them and deleting them.
Also I have to keep client emails for 3-6 months for several reasons. I get stuff like “remember that thing I was asking you about last fall, what is the current pricing & availability”. It is somewhat overwhelming, but it’s part of my business. BTW, the same crap piles up on my phone and takes time to delete.
I kept everything at work, If I deleted something from 2005 I would need it the following week. This saved my buttinski more than once and my Team even more often. I had it all organized and my Bosses were grateful that I did.