How can I get back my account

[Call_me_Dad]

2018.7.8,I started to play Warframe.After 500hours playing via Steam, I feel tierd,so i quit.
Today, I want to get back in this game,but I forgot my password. So i try to find back my password. But when i typedown emailaddress and choose next, It tells me, CAN'T FIND ACCOUNT WITH THAT EMAIL. I can assure that it is right the emailaddress i used in 2018.
in my email,there are about 20 emails . they are from DE,in 2018, they are about emailaddress change authority, but i forgot which email i changed to.
But DE tells me CAN'T FIND ACCOUNT.
SO, PLEASE HELP ME. HOW CAN I FIND MY ACCOUNT

[[Meyo]Frakura]

Take it up with Digital Extreme Support, anything related to account should be discussed with them.

https://support.warframe.com/hc/en-us

You can makes a 2nd account and use that to talk to support about your 1st account.

[DevilNinja]

look at your old Emails

[[DE] Juice]

Locking this thread - previous comments were correct, you'll need to reach out to support about this at https://support.warframe.com.