Quick start

Five minutes from a fresh WordPress install to a sent newsletter.

1. Install the free plugin

1. Plugins → Add New → search One Two Three Send, or upload the zip from this site.
2. Install → Activate. A new Newsletter menu appears.

2. Paste your Claude API key

1. Newsletter → Settings → AI
2. Sign up at console.anthropic.com — free to register, pay-per-token usage (typically a few cents per generated newsletter).
3. Copy the key, paste it into the Claude API key field, save. Stored encrypted.

3. Connect an email provider

1. Newsletter → Settings → Email Provider
2. Pick Resend (recommended — generous free tier) or SMTP (any SMTP host).
3. For Resend: get an API key at resend.com, paste it.
   For SMTP: enter host, port, encryption, username, password.
4. Save, then click Send test email to admin. Check your inbox.

4. Set sender details

1. Newsletter → Settings → General
2. From name (e.g. your site name), from email (must be a domain you verified with the provider), reply-to.

5. Generate, audit, send

1. Newsletter → New Newsletter. Pick tone + length, leave Topic blank to auto-pick from your most recent posts.
2. Click Generate. The draft opens in the editor.
3. Review the body. Use the AI sidebar (Rewrite, Shorten, Fix grammar, Suggest subject lines) if you want to polish.
4. Click Run full audit — fix any FAILs.
5. Add a test subscriber under Subscribers, then click Send Now.

That is the full loop. From here you probably want a signup form on your site and a schedule.

Plugin screenshots