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Deliverability to cox.net

Sending volume, opens, bounce responses, and block messages observed by GMass for email sent to cox.net.

Cox.net is owned and operated by Atlanta, Georgia-based Cox Communications, which was founded in 1962. Cox services more than 6 million customers but announced in 2019 it would no longer offer new email accounts due to dwindling interest. Cox will continue to support existing email accounts.  
Emails sent 8,459,889 Messages represented in this domain dataset
Unique opens 997,053 Unique open events associated with those sends
Open rate 11.8% Across all available data for cox.net

Sent vs. opens

Change the date range or chart style. Bounce and block sections below follow the same selected date range.

Date Sent Opens Open rate

Blocks from cox.net

SMTP responses that generally indicate a valid address whose message was rejected.

No blocks during the specified time frame.

Bounces from cox.net

SMTP responses that generally indicate an invalid or undeliverable email address.

Bounce code guide
2,503 bounce events · 6 response types
  • 552 1 Requested mail action aborted, mailbox not found 1,978
  • 554 30 Sorry, your message to cannot be delivered. This mailbox is disabled . 510
  • 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. For more information, go to 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser 7
  • 552 5.2.2 This message could not be delivered because the recipient's mailbox is full. Please try again later or contact the recipient directly. See https://senders.yahooinc.com/smtp-error-codes#mailbox-full 5
  • aggressive-handler 2
  • 550 permanent failure for one or more recipients 1

Methodology

Send and open statistics

Send and open statistics are updated daily. Every day, open statistics are refreshed for the previous 14 days because not every open happens on the same day an email is sent. Open-rate data remains tied to the emails actually sent on each particular day.

Bounces and blocks

Bounces and blocks update in real time. SMTP responses are de-personalized so similar responses can be grouped for analysis. GMass categorizes responses through internal human review: bounces generally indicate an invalid address, while blocks generally indicate a valid address whose message was rejected.

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