new requests from my techs go in as unassigned account

Basically sometimes I will get an email from a client or anywhere, and then forward it to our support email address which goes into SD Plus MSP. That creates a request, but assigns it to our own MSP account. It is then painful to change the account to the correct client, as per http://helpdesk.manageengine.com/sd/AddSolution.sd?solID=138301

So I just want it so that when I or one of my own techs emails into SD Plus MSP it creates a request with no account assigned, and we can then more easily assign it correctly.
I did have my own email domain listed under my account in 'MSP Details' so I have removed it, but still new requests get assigned to our MSP account.
It is fine though if an unknown email address (e.g. I send in from my gmail address) sends in a request, it is put into SD Plus MSP with no assigned account.

It wouldn't be an issue really if it was possible to easily change the account for a request by editing it, rather than having to go through the edit multiple method as above.

Thanks