The Email Wars

It came to our attention earlier today that Comcast has officially retired the following Road Runner domains:

- jam.rr.com
- midsouth.rr.com
- mn.rr.com
- se.rr.com
- sport.rr.com
- swfla.rr.com
- ucwphilly.rr.com
- houston.rr.com

What does this mean for your deliverability? Any mail sent to these domains is bouncing with permanent, network DNS errors. Comcast has been forwarding mail for several months and reminding subscribers to update their accounts — and just recently retired these domains permanently. These dead addresses cannot be translated to @comcast.net - the individual user must update their own account.

What action should you take today? We recommend a proactive approach, start by disabling any address that has the above listed domains. In addition, check your system for addresses that return a bounce code (usually a 500 error, with: ”PERM_FAILURE: DNS Error: DNS server returned answer with no data”) and suppress any that are associated with the domains listed above.