It depends, but POST to /email is more like "create new email template". As for "recalculate" what I mean is completely different from report. It is that there's some specific state of some object, when all info is already in the system and user has no control over it, but some values (depending on other values that all are already there) are denormalized and specific command from competent user is required to make it happen. For example, thing we "recalculate" might be balance or comission, but it cannot happen automatically, as some human has to verify manually that some parts of that process have been done properly.