Transactional messages
2 Articles
Transactional messages
7 min
Updated17 Sep 2026
Transactional messages are messages sent automatically in response to an action of the recipient. To use such messages in Optimizely Campaign, you first need to define a transactional campaign on the page Transactional Mails .
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Setting up the List-Help header
6 min
Updated07 Aug 2026
This topic describes how to switch from the List-Unsubscribe header to the List-Help header for transactional mails. Currently, every email you send via Optimizely Campaign contains a List-Unsubscribe header.
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