One-time setup: 1. Create a free account at emailjs.com  ·  2. Add your Gmail as an Email Service — copy the Service ID  ·  3. Create a new Email Template with subject {{subject}}, content {{{html_content}}}, To email {{to_email}} — copy the Template ID  ·  4. Go to Account → copy your Public Key  ·  5. Paste all three above and click Save.