When sending an e-mail over the API, you can add “tags” which then show up in Brevo and can be used for filtering: Send a transactional email | Brevo API Documentation
I’d like to know if this is also possible when sending an e-mail directly over SMTP. When I tried the “Ask AI” chatbot it said to use a “X-Mailin-Tag” header. Which does seem to work, but I can’t find it mentioned anywhere in the docs, so I don’t know if it’s safe to use in production or if it’s some work-in-progress / undocumented feature? Thanks.
