Two main reasons why the consent from contacts is helpful while importing contacts:
Protect Your Sending Reputation: Importing bulk contacts without proper consent can lead to higher bounce and spam rates, negatively impacting your sending reputation.
Prevent Issues with Purchased or Rented Lists: Even if some lists claim to have opt-in consent, they may not be suitable for marketing communication tools. Contacts from purchased or rented sources are likely to bounce, unsubscribe, mark emails as spam, and may cause blocklistings.
The following bulk actions cannot be restored:
Bulk Email
Bulk Email Verification
Bulk Update Contacts to Company
Bulk Tag Add
Bulk SMS