Email from MYOB on Windows 8 on Parallels VM
I recently encountered a similar issue running MYOB (accounting software) on a Windows 8 install on MacBookPro. I solved it by installing Thunderbird email client on the Windows machine and setting the account to POP and to not download new messages on startup. Set the Parallels to use default email client and it starts Thunderbird from the sending of an invoice from MYOB.