Internetport

We have downloaded blesta and need to custom it and some future. MY question here , we are using another billing solution today and we are currently sending 1000+ invoices on renewed services every day , can blesta handle it or do we need to do some invoice que and email que that are sending out this invoices , like invoice xxxx sent CHECK OK , go to next invoice xxxx2 sent CHECK OK , go to next invoice xxxx3 CHECK OK I think if blesta sent out all invoice in same time system will not handle it. regards, Peter