blacklisted/cannot get my email on Mac mail through Xfinity

I have called security over and over. I have been BLACKlisted cannot retrieve my email using Mac mail through Comcast servers? It seems to work early am 6:30am then goes to being blacklisted. It started two days ago. Getting nowhere with security dept they said it was put to higher up and I'll be called but nothing. Here is the order #.[Edited: "Personal Information"]. I have been with Comcast for over 35 years. I was told I could keep my email even if I move....I can access it through Infinity site but it's being black listed from my Mac mail account. I get a message when using the Mail connection Dr on my iMac..  IMAP- says trying to log into this IMAP account failed. Verify username and password are correct...   SMTP. Connection and login server succeeded.. I have checked and updated Passwords..So what is one to do have not heard anything from Xfinity security and why does it only start in Early AM and go on all day and night. [Edited: Inflammatory]!!!