Not at all.
My wife is very attractive, has guys hitting on her all the time. It doesn't bother me one bit, I have never once displayed the merest hint of jealousy.
AND THAT DRIVES HER FUCKING NUTS
You start checking her email and she finds out - she's got you by your insecure little balls. You have tipped the balance of power in her favor.
Whilst my wife is very attractive and looks way younger than her 30 years, I look like I've been through the mill and probably just look as young my 42 years on a good day. Still, the balance of power is with me. She is away this week and has called every day saying "you are being a good boy aren't you?" - partly in jest and partly because she feels she has to work to keep me.
Despite me being ugly as fuck,the fact I have never once shown I give a shit what she's up to and that keeps her on her toes.
Apart from this, reading some chicks emails is one step off reading Mills & Boon romance novels. Fuck that noise.