Brand
Dropbox
Subject line
Hi Jonathan, we noticed a new sign in to your Dropbox account
Use case
Transactional EmailsAbout this email
This email notifies the user of a new login to their Dropbox account from an unfamiliar browser and location. It features a clear, concise layout with a summary of the login details and prompts the user to confirm whether the activity was authorized by them via explicit Yes, No, or I'm Not Sure response buttons. The tone is secure and reassuring, aiming to protect the user by encouraging immediate verification and offering additional security resources.
Dropbox journey
Why this works
**Why this works.** The subject line leads with the user's first name and a concrete observation ("we noticed a new sign in") rather than a security warning, which lowers defensive resistance and increases open rates because it feels like a helpful heads-up instead of a threat. The pattern here is "lead with the event, not the fear"; you can lift it for any account security email where you want users to engage with verification prompts instead of deleting out of alarm.
