MailCM is a contextual menu item for copying Apple Mail message properties of multiple messages to the clipboard. The following menu items are available for copying the given properties:

All Headers

All the headers of the message

Content

Contents of an email message

All Headers and Content

All the headers and content of the message

Date

The date a message was received

Time

The time a message was received

Header Message ID

The header message ID string

Mail Message ID

Mail's internal numeric message ID string

Source

Raw source of the message

Reply To

The address that replies should be sent to

Sender

The sender of the message

Subject

The subject of the message

Recipient Name

The name of the first recipient of the message

Recipient Address

The address of the first recipient of the message

Summary

Sender, subject, date, time, recipient and content of the message