Read:

[Notes] Genshin accounts now 100% login via “Outlook/Hotmail”.
[Notes] No more Starter Genshin accounts at AR 10, above AR 20+, and Reroll above AR 46+.
[Notes] One device can only log in to a total of 2-3 accounts; more than that can result in “Too many requests” or “Terlalu banyak permintaan”. Delete and reinstall the game.
[Notes] When logging into a new device, you usually can’t change the email and password immediately (but you can try changing them after checking the account).
[Notes] Issues with changing email/password due to “Too many requests” are advised to play for 7 days (or more) to adjust to the new device.

Read (Specifically for Hotmail/Outlook Login):

[Notes] Do not spam the verification code; the account can get “Too many requests” and you have to wait 2-4 hours to log in again. Make sure to log in to the email first to prepare the code.
[Notes] If the verification code does not appear, check the Spam Email.
[Notes] Issues with changing email/password can be resolved by securing Hotmail first. By logging into Hotmail and directly binding it to a personal email.
[Notes] Outlook/Hotmail gets locked, usually wait 1-3 days. Do not spam login as it will be considered a threat/spam from the new device and will be locked for longer.
[Notes] You can chat with the admin to unlock Hotmail, but not all Hotmail can be unlocked immediately. If it can’t be unlocked immediately, you “must” wait 1-3 days.
[Notes] Do not frequently log in and out/switch accounts. You will definitely get “too many requests” for all Hoyoverse accounts.

General Notes:

[Notes] Account data consists of “Email----Game Password—Email Password” or “Email----Game/Email Password”.
[Notes] Sometimes fast response, sometimes slow response. An online store does not mean the chat is open (could be restocking items, making new merchandise, etc.).
[Notes] No spam chat, chats are replied to starting from the bottom.