Actually, this is a MUST HAVE as this email based restriction is present in no other CRM and creates complete havoc when you try to import data that doesn’t meet the pre-established email based criteria.
Quite a few times, you don’t always have a Contacts email address from the get go…
And if you have some contact list that you could use as Leads but they don’t have email address’ then if you import these, no association will happen and you will end up with a bunch of Companies with no Contacts and Contacts with no Companies.
Please consider changing the way these associations are made!
Thanks!