The customer would like to use a Mail-In Database with mail on cloud.
Mail-In Database is supported in SCN/Verse .
However, it is only support that mail file which is set exists on-premises.
Although admin is able to set a mail file and mail server which of cloud, the message will not deliver to it on cloud, but transfere to on-premise.
Mail-In Database should be allow to set a cloud mail file and deliver to it.
Or to hope that new function as Mail-In Database for SCN wants to be implemented.