If anyone is curious email addresses are divided up based on the directorate you are in. In this case the CRYPTOLOG editor (P02) is under the Analysis and Production Directorate.
Edit: if it isn't obvious, directorates and units under them are assigned letter and number designations so the organizational structure of the NSA isn't immediately obvious to outsiders (i.e. "I work in Q57" vs "I work in the polygraph office")
Edit: if it isn't obvious, directorates and units under them are assigned letter and number designations so the organizational structure of the NSA isn't immediately obvious to outsiders (i.e. "I work in Q57" vs "I work in the polygraph office")