I have sent myself several emails from my work email and all do not arrive in my inbox or spam filter. I am assuming that our domain has been flagged for some reason.
What do I contact?
Comcast security claims they are not blocking anything from that domain. So the only thing I can do is escalate you to the forum admins for follow-up. You should see a response here in this thread.
Thank you for your help. I have tracked it down to something in the footer of our email that is flagging it as spam. The other issue is a copy of emails being marked as spam were not being retained by default in the spam folder.