Help Worried About e-mail being hacked

[steves108]

Back in August when I first got my i1 phone I noticed that some of the incoming (yahoo account) e-mail appearing on my PC were not bold, indicating they had been read. But I had not read them. I may have noticed them on the phone, but had not clicked on them there either. Then about a week ago, I changed my e-mail passcode, and the incoming e-mails stayed bold. But also at this time I was not getting e-mails on the phone due to mix up. I got that mixup corrected, and then I seemed to notice again that e-mails showing up on my PC were not always remaining bold. I don't think my e-mail is being hacked, but I just don't know. Does anyone have an experience like this, that might shed some light on this situation. Thanks, Steves108.