They're sending out a lot of marketing mail (as far as I can see, unsolicited) titled "Rs.500 Off on tickets + 2000 Bonus JPMiles. Enrol now with JetPrivilege!"
Starts off with "This is a marketing initiative. If you are an existing JetPrivilege member, please write to
[email protected]"
So far I've received it on an address I use to read network operations mailing lists, and another that I use to read linux mailing lists.