When the setting "No Re-entry" is chosen, is this based on Subscriber Key? Meaning, if a subscriber with Subscriber Key "[email protected]" and Email Address "[email protected]" gets injected into the journey, then say a week later, they change their email address to be something like "[email protected]" (while SubscriberKey remains the same, "[email protected]"), can this subscriber enter the journey again if "No Re-entry" is selected, or will they not be able to because it's based off of SubscriberKey?
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Couple quick notes. Subscriber Key being an email address is not best practice...If you have SalesForce connector in place, the ContactID from Salesforce will be their All Subscribers subscriberkey. If you have other data source for subscribers, you'll want to delimit their ID as another Unique Identifier.– Tom CallahanCommented Nov 20, 2018 at 19:43
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2 Answers
If I remember correctly it's based off of Contact ID but if your contact's email address changes they should still be prevented from entering as long as their Contact ID remains the same.
When I use the contactid as subscriber relationship, contacts are not getting injected into the journey. I have to change the subscriber relationship to email address in order for journey to work.