Comcast email stopped working- IP blacklisted

My email won’t work on apple email on my iphone 17 with latest ios update. Keeps asking for a password, won’t work on wifi, sometimes loads on data. But when the password is entered, it says IP temporarily blacklisted. This happened before with no resolution and I was asked to send to their security team toun-blacklist and they said my IP isn’t on the blacklist. I’ve ensured the third party thing is ticked. Deleted the email from my apple email and re-adde, and turned the phone back off and on again. I can access email through login at xfinity connect on safari, so I know the password is correct. This has been going on for months now, really unhappy. Can you please have tech investigate ASAP.