Just posted on the official forums by Velost:
Unfortunately, the login server/web portal migration schedule has been delayed. There are many factors which resulted this delay; however, we have decided that the consecutive down-times from the Epic 7 Reanimation and the login server migration would cause too much inconvenience to the players.
As result, we will proceed with the Epic 7 Reanimation update as scheduled on 6/6. But the login server/web portal migration will be delayed until 6/11.
Thank you for your patience.
-Rappelz GM Team"
Info posted on Facebook Fenrir Group, by EvaCassidy, forum mod.