Are you saying your signup flow would automatically log the user in without confirming their email address (verify later)? I wouldn't suggest that for most websites as that would allow someone to signup with an email address they don't own.
For most websites transacting with potentially sensitive information, having an email sent to confirm you own the email address should already be part of the normal flow, so I'm not suggesting any extra step here. I was only suggesting an alternative email response in the situation you try to signup with an email that already exists. The normal happy path signup flow for a new account is not affected at all by my comment.
For most websites transacting with potentially sensitive information, having an email sent to confirm you own the email address should already be part of the normal flow, so I'm not suggesting any extra step here. I was only suggesting an alternative email response in the situation you try to signup with an email that already exists. The normal happy path signup flow for a new account is not affected at all by my comment.