There are a few reasons why you might be unable to send email campaigns to certain contacts:
- They've unsubscribed from your list. In any email that you send to your list, we include an unsubscribe link in the footer. If a particular user clicks unsubscribe in one of your emails, they'll be unsubscribed from your list going forward, preventing you from emailing them unless they resubscribe.
- They've marked your email as spam: If you email a user and they mark your email as spam, we unsubscribe them from your list going forward. This is to protect the deliverability of your future email campaigns. (It hurts the deliverability score each time someone marks a message as spam, and these contacts are more likely to do so again.)
- They have an invalid email address: When you import or collect an email address through one of Hive's Capture Apps, we use third party data to validate whether or not the address is active and valid. If we find that an address is old, inaccurate, or invalid for another reason we mark this as a bad email within our system.