↩ Replying to @kierongillen.bsky.social
I'd check out MailerLite, EmailOctopus or Sendfox. All have free, limited options. Sendfox also has a tier which gives you unlimited sending to a newsletter of 5,000 for a single(!) payment of 49USD.
I personally use a self-installed Ghost platform with Mailgun integration, for full control.
But yeah, I miss Tinyletter...