Yes it even looks like him, he was (the lad I knew) a bouncer who's father had sent him here from tehran in 1980 as it was a dangerous place to be growing up.
He may have had security clearance from before when he served in the local TA. remember back in the 80's we were happy to have just about anyone who could scrape through the medical and he was very fit back then.
If he was sending email from a UK base in Afg to an Iranian email address then my guess is that he was really, really dumb. Someone on our side in front of a screen somewhere would have had little warning messages popping up that one of our team was talking to one of 'their' team without permission.