There is currently only one newsletter that I recommend as being worth your time to read.
The Kickstart Newsletter, is published by Martin Avis. I have been a subscriber to Martin’s newsletter for more years than I care to remember. I think what endears a lot of his subscribers to him is that he includes personal snippets concerning himself and his family along with the business content. Martin will not recommend anything to you unless he has thoroughly researched it first. He has very high standards for anything that he recommends to his subscribers and, to the best of my knowledge, he has yet to put a foot wrong. Subscribe and judge for yourself. See it here
We publish our own newsletter, The Digital Pulse, which you can view and subscribe to at https://thedigitalpulsenewsletter.com/