My emails are all going to trash

My emails go directly to trash.  I clicked on a phishing email in error. Invite from PunchBowl that then sent messages to everyone in my address book. The message I got from Xfinity was: "Your message was not delivered to its intended recipient(s) because our automated spam filtering tools recognized one or more characteristics of your message as potentially associated with spam. Our policies prohibit the transmission of spam using Comcast's platforms and services."  My email is obviously flagged and I cannot send email from my Comcast email and I have several issues with not being able to send messages through my laptop.  How do I get comcast to take my account off a list that is obviously stopping my sends and dumping incoming to trash.