How Attachment Reminders work inside Gmail?

The email is delivered to the receiver. Gmail reveals an alarm if it believes you planned to add a file attachment but forgot to do so and scans the text from your own email.

If You have not seen this sooner, write a new email in Gmail, insert”I have attached the document” from the human body and hit send.

Can the attachment sensor that is forgotten work indoors Gmail?

After you hit the send button, then Gmail scans the text of your incoming message and search for the next word combinations utilizing regex.