"Subscriber joins a list" journeysare triggered when someone signs up through a subscribe form. To prevent unintentional and potentially confusing send, contacts that are added via other means will not by default trigger a "subscriber joins a list" journey.
However, whenmanually addingorimporting subscribers from a file, you have the option to check a box to trigger the "subscriber joins a list" for any new contacts in the dataset. Without selecting this option the journey will not be triggered.
If you have a specific email address you'd like to trigger a journey for, and you have the person's explicit permission, you will need to sign them up yourself through a signup form.
Delivery delays
"Subscriber joins a list" journeys are triggered immediately after someone submits a subscribe form. Or, if youadded a delaywhen setting up the journey, it's sent at the nominated time (for example, 10 minutes or an hour after signup).
After an email leaves our server it's up to the receiving server to accept the message and deliver it to the recipient's inbox. If you're testing a "subscriber joins a list" email by signing up through a subscribe form, and you're not receiving the email, check with your IT or mail administrator to see if it has been blocked or stalled.