Contact Pruning helps you automate the process of keeping the most engaged contacts on your lists and excluding the oldest, least engaged ones from your future sending.
When Contact Pruning is enabled, contacts are automatically blocked after a specified number of emails are sent with 0 opens.
Please note that in order for this feature to work as intended, the Track opens option has to be turned on for your account.
In order to find Contact Pruning, navigate to your Settings>Tracking and Pruning screen.
Set a limit on the number of emails that can be sent to a contact without any opens.
A contact that goes over this limit is then set to "Stale" status in the account.
Alternatively, you can set up the number of days without any opens after which the contact turns to "Stale".
"Stale" contacts will be suppressed from receiving non-transactional email. Transactional email can still be sent to Stale contacts.
To send to contacts that have opted into transactional email only, you must:
A) HTTP API - Pass the parameter "isTransactional = true"
B) SMTP Relay - Add a header "IsTransactional" with the value of "True"
It is important to remember that if your complaint rate increases above the warning level of 0,1%, our system will automatically reset the Contact Pruning by day score back to 10.