Thank you for the swift reply. Very helpful indeed.
Good to know that the checkbox is not part of your theme – this narrows down my search.
Feedburner – I had a closer look at it now. Unfortunately, this service does not allow importing existing lists of subscribers and would require doing this ‘by hand’. As I have several hundred subscribers that’s not really an option.
I’d like to use this opportunity to also thank you for the great theme – I love it, it is easy to use and it does what it should nicely + a responsive developer => what else can you ask for
BW, Peter