Maulana Sher Mohammed Sindhi (later a khalifa) was corresponding with Hakim al Umma Maulana Ashraf Ali Thanvi (Allah have mercy on them).  He had written almost 30 letters.

On a visit of stay at khanqah Hakim al Umma reviewed them all. He disapproved of the manner it was done.  He instructed him to start over the islahi correspondence again. 

Karwan e Mujaddid Thanvi, volume, page 

            ————-

This shows that islahi correspondence has to be done in a proper systematic manner.

 This is the reason for encouraging the seekers to read the book ‘Tarbiyet us Salik’. 
Writing in a haphazard way with pointless details and random thoughts is a total waste of time. Both for the seeker and the mentor. 

If one does not know how to do this islahi correspondence then he/she should ask. 

Janglot, KKH