Cox: no more new email addresses

A few days ago Cox disabled email address account creation for their domain. In recent years, fewer customers have taken advantage of a Cox Email account, so we decided to modify our email service to better serve our customers. As of August 15, 2019, Cox no longer offers the ability for new and existing Cox Internet customers to create new Cox Email accounts. Customers with Cox Email accounts...

FCC Wireless list: Cox.net removed

The FCC wireless list has been updated and cox.net has been removed. The cox.net subdomains remain, but there should be no interruption of marketing mail to cox.net recipients.

Cox and the FCC wireless list

On Nov 20, Cox added a number of domains to the FCC Wireless domain list. One of the domains added was cox.net. This caused understandable consternation among a number of senders, as the opt-in requirements for wireless domains are much more stringent than for sending to non-wireless domains. Earlier today, Tom Bartel, from Return Path tweeted: “We pinged them – likely error -they are...

Problems at Cox: Resolved

People mailing to Cox in the wee hours of this morning may have received a rejection message citing the Invaluement DNSBL. 554 IMP a.b.c.d blocked.  IPBL100 – Refer to Error Codes section at for more information. I spoke with one of the folks at Cox and they said there was an error in the implementation causing non-listed IPs to be rejected erroneously between about 4am to 8am (Eastern)...

Cox FBL update

Delivery mailing lists have been a buzz this week trying to figure out what is going on with the Cox FBL. Someone tried to sign up for the FBL and received a message saying Cox was no longer accepting applications. They forwarded the rejection to some of the mailing lists asking if anyone else had seen a similar message. Panic ensued. Rumors and futile suggestions flew wildly. OK, maybe...

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