Deliverability 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.  
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Sent vs Opens for cox.net

Date Sent Opens Open Rate
10/1/2022 4,997 1,245 0.0%
9/30/2022 4,348 541 0.0%
9/29/2022 5,531 1,673 0.0%
9/28/2022 5,915 1,453 0.0%
9/27/2022 26,130 1,697 0.0%
9/26/2022 12,165 2,212 0.0%
9/25/2022 5,458 2,067 0.0%
9/24/2022 4,786 1,555 0.0%
9/23/2022 6,219 2,092 0.0%
9/22/2022 6,438 2,241 0.0%
9/21/2022 7,460 2,067 0.0%
9/20/2022 6,989 2,580 0.0%
9/19/2022 7,517 2,324 0.0%
9/18/2022 3,671 1,130 0.0%
9/17/2022 5,617 1,895 0.0%
9/16/2022 5,219 1,568 0.0%
9/15/2022 4,892 1,260 0.0%
9/14/2022 5,399 907 0.0%
9/13/2022 4,078 838 0.0%
9/12/2022 4,593 792 0.0%
9/11/2022 2,152 381 0.0%
9/10/2022 3,747 949 0.0%
9/9/2022 4,143 864 0.0%
9/8/2022 4,695 783 0.0%
9/7/2022 4,478 779 0.0%
9/6/2022 4,457 774 0.0%
9/5/2022 3,063 713 0.0%
9/4/2022 2,437 586 0.0%
9/3/2022 3,002 754 0.0%
9/2/2022 3,658 779 0.0%

Blocks from cox.net

No blocks during specified time frame

Bounces from cox.net

Explanation of bounce codes

Message Count
Invalid:550-MailboxUnavailable 5,069
550 5.1.1 Recipient address rejected: User does not exist. 3,252
552 5.2.2 Quota exceeded 66
552 message rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 13
NoMxRecord:0-0 12
Reached max queue time 11
421 4.2.0 sender rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 9
SMTP; 550 5.1.1 Recipient address rejected: User does not exist. 3
421 4.2.0 mail accepted for delivery AUP#CXPOL 1
rejected. /209.85.217.43 authenticated as already sent 463.4 messages for 1h. The SMTP for this hosting account will be restored in 1 hour. See 550 http://www.siteground.com/terms.htm 1
550-5.2.1 The email account that you tried to reach is disabled. 1
550 5.1.10 Recipient not found by SMTP address lookup 1
451 4.3.0 Too many concurrent deliveries for user 1
550 5.4.6 : Recipient address rejected: Sender Domain Hourly Bounce Limit Exceeded - will not be allowed to send emails till as hourly bounce limit is exceeded. Please refer to this: 1
421 - message rejected AUP#SNDR: retry timeout exceeded 1
421 4.1.0 sender rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 1

Methodology

Send and open statistics are updated daily. Bounces and blocks are updated in real-time. Every day, open statistics are updated for the last 14 days. Generally, you'll notice an increase of an open rate for a domain for a day over the course of 14 days, since not all open events occur the same day an email is sent. That means that open rate data is tied to the actual emails sent on a particular day.

Bounce and block codes are the codes as returned by the remote SMTP server after having been de-personalized. Meaning, unique identifiers present in SMTP codes are removed so that SMTP responses can be grouped for analysis. In certain cases, such as when the email is being relayed through an intermediary SMTP server, the remote SMTP server may not be the same as the MX record for the domain. SMTP codes are categorized as "bounces" vs "blocks" by internal human review. Bounces generally indicate an invalid email address. Blocks generally indicate a rejection of the email message but a valid email address.

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