Customer Onboarding Email

Generate a warm, professional customer onboarding welcome email with the following details:

Customer Name: {{customer}}
Product Name: {{product}}
Sender Name: {{sender}}{{steps}}

Write a complete onboarding email that:
- Has a clear subject line
- Warmly welcomes the customer by name
- Introduces the sender
- Highlights 2-3 key benefits of the product
- Includes the getting-started steps (if provided) or suggests a first action
- Offers support contact information
- Closes with an encouraging, friendly sign-off

Format the entire output as a single plain-text email including the subject line at the top (e.g. "Subject: ..."), followed by the email body. Do not use JSON or markdown formatting.