To protect against platform abuse, Vercel employs multiple layers of security and verification during the account signup process.
If you are receiving an error message during signup that tells you your email is invalid, it is likely that your email has been flagged during the verification process and needs to be approved manually.
Contact Vercel Support
To resolve this issue or similar login issues, contact Vercel Support by emailing registration@vercel.com. When contacting support, please include the details of the project you are looking to deploy with Vercel, this will help to speed up the account approval process.