These are a ready make selection of some of the most popular buttons from the Custom Toolbar Button Maker

Thunderbird, Postbox

Delete Events

Delete an event.

Install Delete Events

Download Delete Events

Compatibility: Thunderbird, Postbox SeaMonkey

Delete Tasks

Delete a task.

Install Delete Tasks

Download Delete Tasks

Compatibility: Thunderbird, Postbox SeaMonkey

Detach Attachments

Detach Attachments from an email.

Install Detach Attachments

Download Detach Attachments

Compatibility: Thunderbird, Postbox SeaMonkey

Download/Sync Now…

Runs the download and sync now tool, so that messages can be used when you go offline.

Install Download/Sync Now…

Download Download/Sync Now…

Compatibility: Thunderbird, Postbox SeaMonkey

Edit Draft

Edit a message that you have saved as a draft.

Install Edit Draft

Download Edit Draft

Compatibility: Thunderbird, Postbox SeaMonkey

Forward Inline

Forward the current message as part of the email.

Install Forward Inline

Download Forward Inline

Compatibility: Thunderbird, Postbox SeaMonkey

Get Inbox

Change the currently selected folder to your Inbox.

Install Get Inbox

Download Get Inbox

Compatibility: Thunderbird, Postbox SeaMonkey

Go

Show the Go Menu

Install Go

Download Go

Compatibility: Thunderbird, Postbox SeaMonkey

Insert

Show Insert Menu

Install Insert

Download Insert

Compatibility: Thunderbird, Postbox SeaMonkey

Message

Show the Message Menu

Install Message

Download Message

Compatibility: Thunderbird, Postbox SeaMonkey