Help with mail notice and tagging a person

[Rachael Collins]

Hello,

I have tried using @ to tag someone in response to a comment and it did not post in blue as the others did so I don't believe  it worked, as I never received a response.  Also, I have a notification near my profile photo that seems to indicate I have 7 mail messages, but cannot seem to locate where they are. So much to learn.

Please advise.

Thank you.