email opted out invalid

[shawncooper]

I upgraded to version5.2.0j from 5.0.0 now all my employees get opted out invalid next to there email address, and if i create a new employee i cant add email adress for them.

And, all i am using is crm to log cases , no campaigns etc, when i create a case and assign to user he does not get email notification, notifications are enables and if i go to email and send a mail from there it is deliverd, where am i going wrong???

Any help???