Automation can only be triggered on lists. I've learned already that an automated series targeting a specific list overrides a welcome email set up for "any" new contact. Where can I find the full list of these rules? For example: if one automated series targets two lists, and a second automated series targets one of those two, which one will get triggered? both?
It's important I mention that a new sign-up is not the only way an automation can be triggered. But you are correct, Automated Email Series will override any Welcome Email you have scheduled to send to the same lists. For your example, the contact will receive both automated series. I apologize for any confusion there may be with your automated campaign. Having a full list of "rules" is definitely a great feature request I have tracked in your account. However in the meantime, this is not something that is available. Though this may be the case we do have an article in our Help Center focused on use cases and best practices for creating and sending an Automated Email Series. I hope this helps in the meantime!