Deliverability test
Get a one-time address, send it a normal email from the account or service you want to test, and see how a receiving mail server judges it: authentication, the sending server, the content and the software it reveals, scored out of 10.
Cloudflare wants to be sure you are a person: tick the box above to get an address.
The address works for one hour and takes up to 3 messages of 5 MB. Messages are analysed in memory and discarded: only the findings are kept, and only this tab can see them. Results show no subject, text or full links.