Decided to do a clean install. New server with ubuntu 16.04 and ispconfig 3.1. Install went correctly manually added the domains emails aliases and website to new setup. The only thing that came from the old server was I rsynced the /var/vmail directory to new server. Only problem I have run into is the mail-traffic table is not updating. My admin account showed a small amount of traffic but stopped updating and my other two real mailboxes still show 0KB have about a week. the mail_traffic table only has the 1 mailuser_id in it. I noticed this was a bug in one of the early beta 3.1 but it was fixed. Updated yesterday to the 3.1.1 but no change. Not sure what else to try? This worked with my ubuntu 14.04 and ispconfig 3.05p9.