I submitted the new record of PoPoRogue a few months ago. https://www.speedrun.com/poporogue However moderator doesn't accept it because he can no longer login with his account (reset his password and deleted his email-address). What should I do to describe my record on this site?

The moderator can try contact the site support by email, and ask for help to recover their account. If it doesn't help, or the moderator doesn't want to do that, or the moderator doesn't care about speedrun anymore to go through this process - you can request moderation for the game yourself, through the support hub.

Thanks! I will ask the moderator if he has a will to recover his account.