[SamWhited]

As others have said, I use an RSS reader for this sort of thing. Many newsletters provide a blog/syndicated version anyways which I can subscribe to, and there are bridges available. That being said, I don't have a bridge so for ones that are only available by email I setup filters and put them into folders unless I want to read them every single week (in which case I do think the inbox it the best place).

If you do decide to go the RSS route, I use https://www.inoreader.com and haven't found a better web-based/has a phone app one yet. The others I tried were all full of nonsense AI that kept bugging me, or weird javascripty fancy UIs that broke, or just didn't let me read inline (you had to click through to pages). Other recommendations welcome though.