Mac Mail? The home products don't support that as far as I know. What is your operating system and what McAfee products are you using please?
I'm using Macafee Internety Security. Have used it for the past 2 years have had no issues with email, up until 4 days ago. I'm just trying to troubleshoot the issue, trying to cover all basiss so to speak. My operating system is 10.6.8.
I know nothing about 10.6.8 Internet Security for Windows or Internet Security for MAC? Two totally different products and if the latter this is in the wrong spot for support.
Either way it probably would be quicker to ask Technical Support, it's free by phone or online chat and linked under Useful Links at the top of this page.