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Sendmux
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sendmux-send-email

Send single or batch emails with attachments via Sendmux APIs.

31|1|Updated Jun 17, 2026
Search Tags:#email#email marketing#SMTP#batch sending#Sendmux
One-click install
npx skills add https://github.com/Sendmux/skills --skill sendmux-send-email
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: sendmux-send-email
Source: https://github.com/Sendmux/skills/tree/main/plugins/sendmux/skills/sendmux-send-email
Command: npx skills add https://github.com/Sendmux/skills --skill sendmux-send-email

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires sendmux, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill streamlines the process of sending emails, allowing users to send single or batch emails, include attachments, and utilize various Sendmux surfaces and tools.

Core Features & Use Cases

  • Single Email Sending: Send one email using Sendmux's API, MCP, CLI, or SDK.
  • Batch Email Sending: Send multiple emails in a batch with batch operations.
  • Attachments: Upload and send attachments with ease.
  • Send Path Selection: Choose between Sendmux MCP, CLI, SDK, or direct HTTP for sending.
  • Use Case: For a marketing campaign, use this Skill to send out a batch of promotional emails with attached PDF brochures.

Quick Start

Use the sendmux-send-email skill to send a batch of emails to your subscribers, including attachments, by providing the recipient list and message content.

Frequently Asked Questions about sendmux-send-email

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I send batch emails with attachments for a marketing campaign?▼

You can send batch emails with attachments by providing a recipient list and message content structured as JSON to the Sendmux service. This Skill handles batch operations and attachment uploads, allowing you to dispatch promotional materials like PDF brochures to multiple subscribers efficiently.

What is the best way to send transactional email through an API?▼

Using a structured API like Sendmux is an effective way to send transactional email, supporting JSON-formatted email data. You can use the direct HTTP API, CLI, or SDK to integrate transactional messaging into your applications and automate communication workflows.

Do I need an API key to send emails with Sendmux?▼

Yes, a Sendmux API key or token is required to authenticate and send emails through this Skill. This credential is mandatory regardless of whether you choose the API, MCP, CLI, or SDK path to dispatch your single or batch emails.

Can I use SMTP to send batch emails with this service?▼

This Skill executes batch sending via Sendmux API, MCP, CLI, SDK, and direct HTTP rather than standard SMTP protocols. You provide structured JSON data to perform batch operations and manage attachments across these supported integration paths.

How do I format email data for batch sending operations?▼

You format email data for batch sending as structured JSON, encompassing recipient lists and message content. This structured format allows the Sendmux service to process multiple emails, handle attachments, and execute batch operations via your chosen API or SDK path.

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