New Delhi, Aug. 31 -- The Department of Posts (DoP) has suspended all categories of mail services to the US, including letters, documents, and gift items worth up to $100, over confusion caused by new import duty rules, the department said in a fresh order. DoP has cited carriers' inability to transport US-bound mail and the absence of clear regulatory mechanisms for the suspension. The development follows DoP's August 23 order, which suspended all parcel services to the US. P6...