... Unlimited subscribers. Most newsletters I've seen charge you based on the number of accounts you're mailing to, with this self-hosted option there are no limits. If you need/want a business phone number, I just started using Tello. They're a T-Mobile reseller, but I was able to set up an eSIM with unlimited texting, 100 minutes (but I don't plan to be on the phone a lot). This costs me $6/month and there ...