this is just in game mail announcing Chronoportals event, the event itself was changed slightly last year and mail was never adjusted I guess. Ignore messenger (mail sender) and read /follow body of message By the way the event ends tomorrow night (started last week) so time is really of the essence if you'd like some rewards
Just because Distun isn't some place where you can see him, currently, doesn't mean he stopped existing. Additionally, Chronoportals has been extended until 3/29/20 at 11:59pm Pac time, due to the numerous downtimes. ~ Kaitheel