I think individual letter is better than group mailing as individual letters contains name of the recipients which makes a better feeling to them, which is essential to build a cordial relationship with the PSAs. Group mailing is fruitful in case of weekly action to get 30 VP. In addition, in individual letter, we can address individual problems of the concerned PSAs which may differ from one to another. So although it takes some time, yet it is better for getting better result.
I think individual letter is better than group mailing as individual letters contains name of the recipients which makes a better feeling to them, which is essential to build a cordial relationship with the PSAs. Group mailing is fruitful in case of weekly action to get 30 VP. In addition, in individual letter, we can address individual problems of the concerned PSAs which may differ from one to another. So although it takes some time, yet it is better for getting better result.