I have to tell you guys about this.
We used to use Sonic Pro for our newsletters. I really can't remember why we stopped using it but it must have been because it didn't work well.
So, checking my email I get an email telling me about the Sonic Pro upgrade. Assuming they were using their new upgraded version to send me the news, I had to laugh at the 20 copies of the same mail to the same address
I think they need to test the upgrade a little more