Bulk email – Sending an email to a customer's third-party users


Here is our scenario: My company is responsible for mailing physical paper packets to CustomerCompanyemployees of. Some of these packages were incorrect. We now need to send an email to all of these employees with a PDF attachment correcting the problem, approximately 200 emails. CustomerCompany provided us with a list of email addresses. Users have not explicitly opted for any email from us and most employees probably don't know who My company East.

Questions:

  1. Are we at an increased risk of being reported as spam, as users don't expect emails from us? We may use a separate messaging service if this is the case, so as not to damage our reputation.

  2. Is this a bad practice and / or illegal, given that the employees have explicitly opted for nothing? I understand that there are participation laws, but I think this does not apply, as these are not marketing emails.