Forgotten Attachment Detector

Forgotten Attachment Detector is a Gmail Labs feature that prevents you from sending an email without the wanted the attachment.

Forgotten attachment detector

To activate the Forgotten Attachment Detector, go to the Gmail Labs page and enable it; after that, click on the “Save changes” button.

From now on, every time your message body contains one of the following phrases

and you try to submit the email without attaching anything, you’ll get a warning message.

Read more: “Forgotten attachment detector” on Gmail official blog