At the moment, my understanding is that MYOB relies on MAPI to send e'mails and if you are using an e'mail that does not use MAPI API's you have to save reports as, say PDF, and manually send by e'...
I think I am having the same problem. Does MYOB just fail when it tries to send your email or does it come up with an error message? If so, what is the error message?