What would happen if I used a Sugar Market distribution list before an import to that list was finished?

Question is in the subject. Some additional specifics:

  • Question came up because I want to do a few mailings tomorrow, but I estimate the import will not be done by deadline.
  • The import is being keyed on CRMID
  • We do not have Sugar Market integrated
  • The emails sent tomorrow will be part of a Nurture 2.0 campaign