While this can be done in a more complex way, it would be nice if it was able to behave in the same way as dynamic content is on subject line, text or image. This would simplify work and make things consistent.
I see that this came up a couple of times already. For companies (like ours) that work in different languages and make dynamic emails, we need dynamic preheaders. I cannot sell to my marketeers the fact that I cannot add a preheader because Marketo is not supporting it in dynamic mails.
Adchoices