ashMaiSv.exe is the avast email scanner, having terminated/disabled it, no checks will made to the email ports.
The problem hasn't been solved all you have done is killed the process reporting the symptoms, e.g. multiple identical emails, likely to be a trojan spambot at work.
I'm at a loss as to what to suggest, I think you may have crippled avast using other tools. I suggest you download the latest version of avast and save it on your HDD, uninstall avast, reboot, install the latest version and reboot.