Dan,
I looked thru the logs and found nothing. So I went back thru the server seetings and turned off the webmail, saved the settings and then went back in and set webmail to https:. and it's all working fine again. something in the update, or something that I did wrong during the update, must have changed a value in the security settings. At any rate, it's all back to normal (what ever that is).
thanks,
Mark