In Blesta, you can create email templates under Settings > Company > Emails. If you need a custom header, footer, or logo, modify the email templates there.
It looks like your Nginx configuration for Blesta on HestiaCP is mostly correct, but the error pages and API calls aren’t working. Here are some potential fixes and modifications you can apply:
1. Fix Error Pages Not Working
2. Fix API Calls & Feed Not Working
3. Ensure Proper API Rewrite Handling
4. Restart Nginx & Debug Logs