I am sending and receiving webmails. The error message you have is the same as I had, and I checked that it is produced by Afterlogic. It went away after I unchecked SSL.
My Kloxo-MR is not fresh install (approx 1.5 months since I installed), but yum updated to latest version.
The funny thing is that I have another VPS with same panel version, which has been running for at least 6 months. On this one I have SSL checked on Afterlogic, and it works - no problem.