Steve*R,

Would not that New York law be considered restraining commerce? If not, how is it different.

OK, I had too much time on my hands. Here's what the USPS website offers for info.

http://www.usps.com/cpim/ftp/pubs/pub52.pdf 
Pub 52 is the guide for Hazardous, Restricted, and Perishable Mail. It only restricts the shipment of Tobacco seeds and plants. There is no restriction specified for domestic shipments of cigars.

http://www.usps.com/cpim/ftp/pubs/pub141.pdf 
Pub 141 is the global express guide that outlines the shipping limitations for cigars to various countries. They do restrict shipment of cigars to many countries.