Re: Dear "The Intercept"
From what I read about it, when it was published the NSA did a search to see who accessed the document, and found that six people had, and she was the only one with correspondence with a journalist.
They didn't say whether she used her NSA email to correspond - one would hope not, but she's probably sending it plaintext which would get it captured by the NSA's backbone snooping.
No microdots required.