I have been informed by MailPoet support that it is not possible to customise the Subscription Sign Up Confirmation email to include the subscriber’s first name, as the only shortcode currently available for the content is the one which confirms the subscription.
From a branding and customer engagement point of view, I think personalization is very important, in fact I seem to recall MailPoet emphasising its importance in a blog article.
Apparently it is also not possible to customise transactional emails sent to Administration either.
The one you currently receive when there is a new sign up (I.e “Howdy…The subscriber….Cheers, The MailPoet Plugin”) is frankly a bit corny, and could do with some more information.
I would like to at least see the First Name shortcode (and others if possible) added to the Subscription Sign Up Confirmation email.