I write a newsletter for a chapter in a large non-profit. I update the contacts monthly for the chapter from the national's records. Recently, the chapter contacted members without email addresses on file for their information. Several were willing to give the chapter their email, but asked that the email address not be shared with the national organization.
If I update next month from the national records, will the blank email address overwrite the email address that I have manually entered into Constant Contact?
Basically, is the Constant Contact match for records on the first and last name or the email address?
