I have checked my husband's email and call log. When we first started dating I trusted him blindly and after we were married I found out he had cheated several times.
I left him and we remained seperated for three months but got back together in January were he swears he will never cheat again. If he does cheat again, I'll simply leave him, but I love him enough to give our marriage a second shot.
My thought now is trust, but varify (spelling?).
In the beginning I checked his messages, emails and call log every couple hours (secretly), now I check his emails once in a while and never touch his cellphone.
I check his emails if I get a bad feeling or start to suspect something... but other than that, he is regaining my trust.