Problem Reported: Users are being prompted for passwords/requesting authentication when attempting to access email.
Update [4:10PM] Problem was due to software malfunction while upgrading one of our existing mail servers. The issue has been resolved allowing all users to access their mail as normal.
*If you are experiencing a problem that has not been reported here, please contact us by calling our support line toll-free (877) 710-7993. Please note: posting in the comments is not an official way to contact Kyvon.