If the campaign is paused or sending accounts have errors, and once sending accounts are restored or new ones are added, the new emails from new accounts or newly added accounts or the ones which are reactivated should be sent considering the last contact date. So if the last email was sent nine days ago, the next email should only be sent, including the follow-ups, based on the contact date, not based on the campaign pause or resume or has errors. Contact steps should only follow the last contact date for each prospect.