I see now what is happening.
I have been expecting an email alert not monitoring the alerts shown on the upper menu bar.
Because I have all alerts turned on in my account settings these with @usernames are generating alerts but they basically getting lost in the other alert noise.
I have been expecting an email alert not monitoring the alerts shown on the upper menu bar.
Because I have all alerts turned on in my account settings these with @usernames are generating alerts but they basically getting lost in the other alert noise.