I noticed when I go to make an email account, the dropdown will not list more than one domain per user. It seems to only be listing the domain that was used to create the user and none of the ones added afterwards. I tried the SubDomain email and adding "user@domain.com" or just "domain.com" it gives the following:
ERROR! User Mismatch, please contact your system admin.
Am I missing something or is this a known bug?