E-mails can be attached to other e-mails as an EML file. This allows the recipient to view the email in full.

In the case of spam, the hidden information from the email header can also be transmitted.

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Bildschirmfoto von Outlook Desktop. Das Menü "..." neben der Schaltfläche "Weiterleiten" ist ausgewählt. Ein Mauszeiger zeigt auf "Als Anlage weiterleiten".

Outlook 2024 (Desktop)

In Outlook, you can forward emails as attachments. This is possible using using a menu action or by drag & drop.

Menu action

Select or open the email to be forwarded.

Expand the Overflow menu ("...") next to the Forward action. Select the menu item Forward as attachment.

A new email window opens and you can compose a message with the email as an attachment.

Drag & drop attachments

Compose a new email. Use the mouse to drag the email to be sent from the message bar into the new email.

In Outlook, this email is then attached to the new message as an "Outlook item".

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Screenshot of the Outlook web interface. A red arrow points from a mail in the message list on the left to the text field of a new message on the right.

Outlook Web interface (Webowa)

As with Outlook, Webowa allows you to send emails as attachments using drag & drop.

Create a new email and drag the email to be sent from the message list into the new email.

This attaches the email to the new message.

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Screenshot Horde

Horde Webmail

Highlight the email to be sent or open it.

Click on the triangle next to Forward. This opens the submenu. There, select "As attachment".

A new email window opens and you can compose a message with the email attached.

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Screenshot Thunderbird

Mozilla Thunderbird

You can also forward emails as attachments in Thunderbird. This is possible by clicking a menu item or via drag & drop.

Menu action

Mark the email to be sent or open it.

Click on the message with the right mouse button. Then select "Forward as" from the menu and then "Attachment".

A new email window will open. Here you can compose a message with the email as an attachment.

Drag & drop attachments

Compose a new email. Use the mouse to drag the email to be sent from the message bar into the new email.