Does anyone know if this NSA messagel is legit?

[SamT]

The message itself has legitimate content insofar as it's a current issue that's being debated and there are campaigns to get you to write to your representatives to get the CISPA (Cyber Intelligence Sharing and Protection Act) dropped.

I don't see any reference to the "NSA" in your message, so I don't know where you got that from. The EFF is the Electronic Frontier Foundation and it campaigns for privacy and freedom online. It's against laws that give the government a right to snoop on people's private emails and internet activitity, and since CISPA is one of the biggest incursions into online privacy and freedom ever, it's obviously something they're trying to stop.

Is it spam? SPAM is unsolicited email, so if you've never signed up for it, yes. Just because they're the EFF, that doesn't mean when they do massive mailouts they don't, accidentally or intentionally, mail a few people who never meant to sign up for it.