Good uses for an email QR code
- A feedback card on restaurant tables or hotel desks, with the subject “Feedback: table 12” so you know where it came from.
- A “report a fault” sticker on shared equipment, with the machine’s ID already in the subject.
- Event sign-ups: “Send to join the mailing list” on a poster.
The pre-filled subject is the useful part. It sorts incoming messages for you and saves the sender from having to think of what to write.
What’s inside the code
The code holds a standard mailto: link, the same as an email link on a web page:
mailto:it-help@school.example?subject=Projector%20fault%3A%20Room%2014
Spaces and punctuation are encoded so that every mail app reads them correctly. Some generators encode spaces as plus signs, which iPhone Mail and others then show literally: “Projector+fault”. Codes made here don’t have that problem.
Limits
The person scanning needs an email account set up on their phone. Most do, but if yours is a public-facing sign, print the address underneath as well. Keep the body to a sentence or two: long text makes the code dense and harder to scan, and the sender can type the rest.
Questions
Can I add several recipients or a CC?
Put several addresses in To, separated by commas. Most mail apps accept that. CC and BCC are not offered here because support for them varies between apps.
Is the email sent automatically?
No. Scanning only opens a draft. Nothing is sent until the person presses Send.