Email delays

I am on the website team for a large 55 and over community in South Jersey. We have over 1200 homes with close to 2000 residents. It’s become apparent, through my personal experience and that of hundreds of other residents, that there is a significant problem with Xfinity email. I would estimate that there over 1000 Xfinity email customers in our community. Most are experiencing email delivery delays of 1-5 hours from the time they are sent til the time they are received. This came to a head during a recent website update that required a response from the users that had a “time-out” limit of 3 hours from the time they logged on until they received an email response. Few (if any) Xfinity users received the email within that time. No one with any other provider had the issue. Yahoo, Gmail, Verizon, Outlook and any other provider…including AOL…had no issues.  Xfinity, however, caused a nightmare of manual input by our team for hundreds of accounts. A senior community like ours can be very dependent on timely communication from management. In the recent ice storm, emergency communications from management took as long as 5 hours to get to Xfinity users here. Everyone else, a matter of minutes. Needless to say, this is not acceptable. Please look into this issue and provide any help you possibly can. Thank you.