Mail system changes in 4.7.2

Hi there,
first of all let me thank you for your continuous work on this vital plugin.

I appreciate the new mail possibilities, but what really gave me a lot of work: The new system uses different presets as the old one. The most noticeable one: The topic is now missing the [ninjafirewall] tag which had been quite useful to automate email sorting, filtering and processing.

Yes, of course I can change that by editing the template, it’s just a lot of unnecessary work to visit each site and upload the changes. Maybe you can keep a keener eye on backwards compatibility for future rewrites. Anyway, keep up the great work!