Email Aliases Management with API

I opened up a ticket with support and they directed me to post on this forum...

Before the switch over to Smarter Mail, I was able to use the API to add new Email Aliases. Now when I try to use it, I get the following SOAP Exception: Server was unable to process request. ---> Domain Name '****.com' is not currently on Mail.v2. Is this API functionality no longer supported? Will it be added back in the near future?

Also, previously the Email Management screen said my domain had an unlimited number of Email Aliases. Now when I try to manually add in new ones, it says I have reached my limit of 1000. Did I lose the ability to have an unlimited number with the switch?

Thanks for any assistance,
Robert