ah ok,
yeah I had that one before, at stars to be precise - my normal mb email adress's domain starts with a number and for whatever reason stars can't handle email adresses formatted such anymore (which had to be new, since I'm registered with it there for ages).
So I had to make a new email just for stars and then also add this email as an alias on mb in order to be able to deposit.
In the same vein, make sure not to delete that mb alias or any money sent to that adress will get stuck and no one will be able to tell you where it's gone as the pokersite sees from their end the money arrived at mb and mb sees there never was any payment
re enabling the alias made the money appear instantly luckily - that was about the only time I thought I "lost" money through something fishy but in the end it was my fault obv.
@lesloldennis:
I don't know for CC but with MB you can request them to up your limit once you've exhausted your current one, I think there is even a button in the cashier for it, no need to email the support but not sure.