The prod ASM tenant tied with <user name's> email id). Is there an option to get this changed to a another email id ?
Real Ask:
<user_name> may still use the admin account. But not wanting to receive expired cert messages . So, may need to set some other user to receive them instead. Failing that, switch the master account to another user.
The simplest solution would be change email accounts.
Other solutions including possible enhancements and using email inbox rules are also possible