Can't received the digit code email for password change

Hi. since today, I can’t log in even though I don’t remember changing my password. Therefore, I tried to change Password, but I haven’t received the digit code email from D5.
I’m still waiting about 1 hour but still no email.
I have double-checked the email address I entered several times and confirmed that it is not being sent to the spam folder. Please provide a solution.

Sorry for this, please check your DM.

Hi. Today I need to register a new account using another email, but I also did not receive any code on the email. I checked all the folders and didn’t see any code sent. Please tell me the solution