I checked “Edit My Account” through the old C2 website link.
It turned out all the three “Do not send…” had not been selected (checked), meaning I was willing to receive all C2 trading signal related emails.
Since I never received any filled order related emails from C2, it is clear to me that right now C2 does not send out Filled Order email alert to users.
I do not think there will be a lot of efforts have to be made to make the Filled Order alert mails to go out to C2 users, maybe there is just a tiny mistake that caused the problem.
I’m waiting for the arrival of Filled Order email alerts from C2.