[mminer237]

So each business card would have to be unique with a unique address? I feel like it is generally considered unprofessional to have an email address with random letters in it, not to mention, you'd need a special business card printer to handle that.

[ivan_gammel]

The email address can be user-friendly, but card can also include an unique code similar to product serial numbers, that is redeemed with the first message.

E.g. „Max Mustermann“ <ABCD-1234-XYZW|[e-mail]> is a valid email address with unique code part.

[gcanyon]

I think yes, this would be required. An email address with random characters in it for no reason would certainly be questionable, but if the use case I'm proposing becomes at all known it would be much more understandable I think.