I use my own RSS-to-Email service https://feedmail.org/. I've written about my setup and why I prefer RSS-to-Email on my blog nearly a decade ago https://kevincox.ca/2013/06/27/email-as-rss-reader/.

I used to use https://blogtrottr.com which I do still think is a good product, they just didn't quite fit my needs so after about 8 years I ended up creating my own.