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

Thunderbird, Postbox

Unread Threads

View threads that you have not read yet.

Install Unread Threads

Download Unread Threads

Compatibility: Thunderbird, Postbox SeaMonkey

Add Email

Add a new email address to the address book.

Install Add Email

Download Add Email

Compatibility: Thunderbird, Postbox SeaMonkey

Email Headers

Sets what headers are displayed for an open message.

Install Email Headers

Download Email Headers

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

Archive Thread

Send the Selected Thread to the Archive

Install Archive Thread

Download Archive Thread

Compatibility: Thunderbird, Postbox SeaMonkey

Copy Email

Copy the email address of the currently open email the the clip board.

Install Copy Email

Download Copy Email

Compatibility: Thunderbird, Postbox SeaMonkey

Go

Show the Go Menu

Install Go

Download Go

Compatibility: Thunderbird, Postbox SeaMonkey

New Event

Add a new event into the calendar.

Install New Event

Download New Event

Compatibility: Thunderbird, Postbox SeaMonkey

New Task

Add a new task to the calendar.

Install New Task

Download New Task

Compatibility: Thunderbird, Postbox SeaMonkey

Paste As Quotation

Paste text so that it appears as a quoted message.

Install Paste As Quotation

Download Paste As Quotation

Compatibility: Thunderbird, Postbox SeaMonkey