Compose Format and Send Thunderbird Emails

Compose Format and Send Thunderbird Emails

Overview

Handle the standard new-message workflow in Thunderbird: open a fresh composer, fill the headers and body, apply visible formatting when required, and send the message.

When to Use

• Use this skill for fresh outgoing emails rather than replies, forwards, or draft edits.
• This skill ends when the compose window is ready to send or the send action is executed.

Preconditions

• Thunderbird is open on the Mail surface or can be returned to from the current window.
• The requested mailbox, account, sender, recipient, or folder name from the task is already known.

Atomic Capabilities

• opennewmessage: Open a fresh compose window and fill the message headers.
• Derived from: Compose New Email
• format_body: Apply visible compose formatting before sending.
• Derived from: Format Email Body
• send_message: Send the prepared Thunderbird message.
• Derived from: Send or Save Composed Message

Decision Guide

• If no compose window is open yet, choose open_new_message. Start from the Mail toolbar so the new composer is opened on the intended account surface.
• If the body already exists and only visual formatting must change, choose format_body. Work from the active compose window and verify the formatting in the visible editor before sending.

Visual Annotation Conventions

• Red boxes mark the interactive target that should be clicked, typed into, or otherwise manipulated.
• Green boxes mark the state signal or result change that the agent should verify before continuing.

Image References To Create

• new_message_entry.png
• headers_ready_for_edit.png
• send_ready_with_visible_content.png

Procedures

Open a new message, fill content, and send it

State-Action Mapping

State 1: newmessageentry

Visual grounding:

• Thunderbird Mail shows the New Message control that opens a fresh composer.
• Image reference: Images/new_message_entry.png

Trigger condition:

• A new outgoing message is required and no compose window is open yet.

Action:

• Click New Message to open the composer on the current mail account.

State 2: headersreadyfor_edit

Visual grounding:

• The compose window shows the recipient and subject fields ready for the requested message content.
• Image reference: Images/headers_ready_for_edit.png

Trigger condition:

• The compose window is already open and ready for the main message text.

Action:

• Fill the To and Subject fields, then enter the requested body content and visible formatting.

Expected Result (State 3)

Visual grounding:

• The compose toolbar shows Send while the requested content and formatting are already visible in the editor.
• Image reference: Images/send_ready_with_visible_content.png

Trigger condition:

• All requested content and formatting have already been entered.

Common Failure Modes

• Opening a reply or draft flow instead of a fresh message window.
• Sending before the visible body formatting matches the task.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: walterhu1015
• Source: walterhu1015/MMSkills
• License: Apache-2.0

Install and usage instructions live in the source repository linked above.