intermittent problems sending email to certain domains

Hello, dons12. We understand how frustrating it can be when email isn’t working the way it should, and we’re here to help. If Xfinity emails aren’t sending or receiving from specific domains, a few steps can often resolve the issue. Start by checking your Spam or Junk folder and reviewing any filters to make sure nothing is being routed incorrectly. It can also help to add the sender to your address book. Additionally, make sure that ‘Safe List Only’ mode is turned off, check for any blocked IP addresses, and confirm that the sender’s domain has the proper DNS records in place. These steps usually help get things flowing smoothly again. Check out the link included below for more helpful information.

https://www.xfinity.com/support/articles/email-errors