Whenever we create new user or try to reset the password for ODK central server, users are not receiving emails to reset the password or set up the password

Whenever we create a new user or try to reset the password for ODK central server, users are not receiving emails to reset the password or set up the password

See https://docs.getodk.org/central-troubleshooting/#users-aren-t-receiving-emails. Emails coming from a server (rather than a mail service) are much more likely to be marked as spam and dropped.