We understand your concern about an email address being marked in red (Do Not Send) despite the contact opting in. This can happen for several reasons, as ListDefender evaluates contacts based on three key factors: Email Validity, Quality, and Engagement.
An email may be marked as red if it is:
Undeliverable
Unengaged (the contact has not interacted with your emails for a significant period)
Flagged by our email quality checks
Even if a contact has opted in, they can still be marked as red if there are deliverability concerns or if they haven’t engaged with your emails over time.
To find out why a specific email was flagged, check for additional tags applied by ListDefender, such as "Valid Check" tags, which provide more insight into potential issues.
For more details on why a contact was marked red:
Open your ListDefender dashboard.
Navigate to Contacts.
Enter the email address in the search box and select the contact.
Scroll down to Most Recent Report to review the details explaining why the contact was flagged.
As you can see this contact has opted-in and has recently engaged. But they are marked as "Red"
Click on "Most Recent Report" at the bottom of the page
This contact is not marked as "Red" due to engagement or opted-in or out, it's because the contact did not pass the Quality Check. It was marked as "Suspicious Terms Detected." This is because the First Name filed is not the normal format of "Tyler" its "Tyler V" so it was flagged. If this is OK then you can click on the green flag, and on the next scan we will update this contact to no longer be marked as "Red" due to suspicious terms.
You can also see why a contact is marked as "Red" by looking at the journey on the right side of the screen by clicking on "Red (Do Not Send)"
If you need further assistance, feel free to reach out to our support team via chat