You can edit several options right before you send an email. Set up the priority, mark the email as confidental, attach a vCard or request a read receipt.
When composing a new email, you can find these settings by clicking on Options.
You have a number of options for sending emails.
You can change the priority of your email. Changing the priority to high will not cause your email to be sent faster. However, this setting can let the recipient know that this email contains important information.
You can mark your email as confidential. This function is only for informational purposes. You can use this function to ensure that the recipient does not share the contents or forwards the message to any unauthorized persons. If you send a confidential email to a GMX address, it will appear in the inbox with a confidential icon.
You can attach your digital business card to your email (as a VCF file). The digital business card allows you to easily exchange personal data such as your name, phone number and address. You can edit your business cards in your Contacts settings.
You can request a read receipt from the recipient. A read receipt confirms that your message was opened. Please note that the recipient can decline to send read receipts. There are other scenarios in which read receipts are not sent, such as when the recipient's email program doesn’t support read receipts. There is no way to force a recipient to send a read receipt.