I'm researching why several thousand of our subscriber records are not being sent emails. I've confirmed the subscribers do not have an 'unsub' or 'held' status. My next thought was to run a Tracking Extract and review the contents of the NotSent.txt file.
The NotSent.txt file contains a Reason column. But, I cannot find documentaion on all the Reason values and a definition of each.
In the Tracking Extract I ran, I see the following Reason values:
- Account Level Opt Out
- Domain Exclusion
- Excluded by Send Time Filter
- List Detective Exclusion
- List Level Opt Out
- Subscriber Deleted
- Suppression List Exclusion
- Unsubscribed Master
Some of these I understand - like 'Held', 'Domain Exclusion' and 'Send Time Filter'. But others I do not understand. For example, what does 'Account Level Opt Out' means and how is it different from 'Unsubscribe' (or 'Unsubscribed_Master')