There are 5 types of Contact status in CRM. The status will be changed automatically based on the audience’s response, also you can change them manually.
Someone who has interacted with your lead source, but hasn’t opted in to receive your email. This is the default status of an audience. All pending audiences will get a double opt-in email to confirm their subscription. This is required by GDPR policy and is very useful to avoid spammer.
Someone who has opted in from your lead sources and also confirmed the double opt-in email you sent.
Someone who was opted in to receive your email marketing campaign but currently opted out.
An email is marked as bounced if a double opt-in email has not received by the recipient’s mail server and returned to the original sender. A bounced email means that your mail has not been delivered, this happens if the email address is invalid.
If a double opt-in email is received by the recipient’s mail server but the email delivery is rejected by the server’s API.