houston u.s. secretary state rex tillerson chief executive exxon mobil corp xom.n use alias email employees board members primary account jam many message oil company say tuesday new york attorney general eric schneiderman investigate whether exxon mislead shareholders public climate change write judge monday accuse exxon previously disclose alias tillerson climate-change communications exxon deny try hide anything alias use discuss climate change exxon spokesman alan jeffers say tuesday account use everyday business senior executives need reach tillerson leave company end 2016 become secretary state tillerson receive thousands email day climate change activists others regular address rex.w.tillerson exxonmobil.com make difficult parse message important promptly address exxon business operations jeffers say tillerson use email alias eight years send thousands message sixty-four send receive meet parameters schneiderman climate change subpoena turn new york officials jeffers say email alias wayne.tracker exxonmobil.com wayne tillerson middle name tracker likely reference past involvement boy scout america although trump vow reverse climate-change step take former president barack obama exxon say believe must address climate change monday say exxonmobil believe risk climate change clear warrant action darren woods succeed tillerson exxon ceo january use email alias exxon employee jeffers say use email alias seize upon environmentalists tuesday say reveal pattern deception nothing hide secret email account say jamie henn 350.org environmental group exxon plan respond schneiderman court file within next several days jeffers say case people state new york pricewaterhousecoopers exxon mobil corporation new york state supreme court new york county 451962/2016 tillerson 's email alias prompt business need exxon say