openclaw run resend-email \
  --to="recipient@example.com" \
  --subject="Hello" \
  --text="Plain text message"

Usage

Basic Text Email

openclaw run resend-email \
  --to="user@example.com" \
  --subject="Notification" \
  --text="Your task is complete."

HTML Email

openclaw run resend-email \
  --to="user@example.com" \
  --subject="Welcome" \
  --html="<h1>Welcome!</h1><p>Thanks for joining.</p>"

Multiple Recipients

openclaw run resend-email \
  --to="user1@example.com,user2@example.com,user3@example.com" \
  --subject="Team Update" \
  --text="Meeting at 3 PM."

CC and BCC

openclaw run resend-email \
  --to="primary@example.com" \
  --cc="manager@example.com" \
  --bcc="archive@example.com" \
  --subject="Report" \
  --text="Please find the attached report."

From Agent

When agent needs to send email:

# Use exec to call the skill
exec openclaw run resend-email \
  --to="recipient@example.com" \
  --subject="Automated Notification" \
  --text="This email was sent automatically by the agent."

Configuration Options

Variable	Required	Default	Description
`RESEND_API_KEY`	Yes	-	Your Resend API key
`RESEND_FROM`	No	`onboarding@resend.dev`	Default sender address

Sender Addresses

Test domain: onboarding@resend.dev (default, no setup required)
Custom domain: noreply@yourdomain.com (requires domain verification in Resend dashboard)

Limitations

Attachments not supported (Resend API requires base64 encoding)
Rate limits apply based on Resend plan
Email size limits per Resend documentation

Troubleshooting

"RESEND_API_KEY not configured"

Set RESEND_API_KEY in .env file or environment

"Failed to send email: Unauthorized"

Check API key is correct and active
Verify API key has email sending permission

"Failed to send email: Bad Request"

Check recipient email format is valid
Verify from address is verified (for custom domains)

Resources

scripts/send_email.py - Main email sending script

resend-email

Resend Email Sender

Quick Start

1. Configure

2. Send Email