In fact, the popular practice of Raksha Bandhan has its historical associations also. The Rajput queens practised the custom of sending rakhi threads to neighbouring rulers as token of brotherhood. The central ceremony involves the tying of a rakhi (sacred thread) by a sister on her brother's wrist. This symbolizes the sister's love and prayers for her brother's well-being, and the brother's lifelong vow to protect her. The festival falls on the Full Moon day (Shravan Poornima) of the Shravan month of the Hindu lunisolar calendar. One Islamic Scholar believes that Raksha Bandhan grew in popularity after Rani Karnavati, the widowed queen of Chittor, sent a rakhi to the Mughal emperor Humayun when she required his help.
The above text courtesy on Raksha Bandhan (Rakhi Festival) is from the web site of wikipedia.org http://en.wikipedia.org/wiki/Raksha_Bandhan
This year Raksha Bandhan (Rakhi) Festival coming on 21st August, 2013.
In my collection i have 2 different Rakhi Mail envelopes issued by Gujarat Postal Circle & Maharashtra Postal Circle.
This is Rakhi Mail envelope issued by Gujarat Postal Circle.
This is Rakhi Mail envelope issued by Maharashtra Postal Circle.