Can't send email to customers

  • 27
  • Question
  • Updated 4 years ago
My company has comcast business broadband service, which is probably not related to the problem here: We host our own email. When we send email to recipients on, it comes back as delayed or undeliverable. Comcast tech support tells me our IP is not on Comcast's "block list." I have been unable to determine why we cannot send email to accounts. I'm reluctant to call Comcast tech support again, because the technicians who answer often know less than I do -- some don't even know what a static IP is, and others have insisted that the static IP config on our modem needs to be reconfigured (it doesn't) and when they attempt to re-build the file, we always lose all email service for hours, until I call repeatedly to have someone else repeat the process, correctly. Any help will be welcome.
Photo of holmes7


  • 3 Posts
  • 1 Reply Like
  • frustrated

Posted 9 years ago

  • 27
Photo of ComcastCares

ComcastCares, Comcast Digital Media Outreach Team

  • 245 Posts
  • 25 Reply Likes
Official Response
If your IP address is causing mail to be blocked, please review the return mail message and go to the following website

The return message will have an error code, and the web link above will provide you the FAQ for the specific error code. Once you access the FAQ it will explain how to correct this. We certainly do not want to cause any inconvenience, but these measures are designed to prevent spam. If you are using a shared server, others may have used it for spam causing the trouble.

First I thought I was the king of caffeine! If you did not receive a returned email, your original probably landed in her junkmail filer. If you did receive a return message, I would need to see that to understand.

Thank you everyone!
Frank Eliason