Mail

I have been unable to receive any mail on my iPhone for the past week. First it was repeatedly asking me for my password and now I am getting the message 

Cannot Get Mail

The mail server "imap.comcast.net" is not responding. Verify that you have entered the correct account info in

Mail settings.

Server code "ALERT", server message

"Temporarily blacklisted IP Address - try again later".

Account setting on phone as follows:

Host name: imap.comcast.net

user name: (my email address)

password: (my password)

smpt: smpt.comcast.net

advanced settings: use SSL

server port 993

so, what am I missing? Please help! And thank you

PS if I select anything under tags, my whole post disappears and I get an error message