How would a marketer ensure that all subscribers receive an auto-responder email?

In Adobe Marketo Engage, an email can be designated as 'Operational'. This classification is reserved for non-promotional, transactional, or relationship-based messages, such as registration confirmations, password resets, or critical system notices. By design, operational emails bypass the 'Unsubscribed' and 'Marketing Suspended' statuses of a person record. This ensures that all recipients receive the communication, as it is considered essential rather than a marketing promotion. This is the correct and intended method within the platform to guarantee delivery to the entire target audience for such communications.

B. Change the subscribers' Unsubscribed / Marketing Suspended status in the Database so they receive the auto-responder email: This is a violation of best practices and potentially anti-spam laws (e.g., CAN-SPAM, GDPR). It manually overrides a subscriber's explicit preference not to receive marketing emails and is not the proper use of the platform.
C. Mark the auto-responder email as Unsubscribed / Marketing Suspended: This option is technically incoherent. Subscription statuses like 'Unsubscribed' or 'Marketing Suspended' are attributes of a person record (a subscriber), not an email asset. An email cannot be marked with these statuses. ---

1. Adobe Experience League Documentation, "Operational Emails." This document states, "Operational emails are critical transactional emails that you need to send to your customers... They bypass the Unsubscribed and Marketing Suspended statuses." It further clarifies the types of emails that qualify, such as registration confirmations and billing statements. (Adobe Marketo Engage Product Docs, Operational Emails section).

2. Adobe Experience League Documentation, "Understanding Unsubscribe." This guide explains how the unsubscribe field functions. It details that when Unsubscribed = True, the person will not receive most emails, but explicitly notes the exception for operational emails. (Adobe Marketo Engage Product Docs, Email Deliverability section, Understanding Unsubscribe subsection).