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.  

Emails Sent to cox.net: 4,482,908

Open Rate to cox.net: 383,152 (8.5%)

Date range:
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Sent vs Opens for cox.net

Date Sent Opens Open Rate
10/27/2021 3,381 123 0.0%
10/26/2021 3,079 167 0.0%
10/25/2021 2,887 163 0.0%
10/24/2021 1,728 102 0.0%
10/23/2021 1,695 101 0.0%
10/22/2021 2,712 249 0.0%
10/21/2021 2,561 173 0.0%
10/20/2021 3,721 262 0.0%
10/19/2021 3,055 225 0.0%
10/18/2021 3,586 220 0.0%
10/17/2021 1,267 79 0.0%
10/16/2021 1,596 105 0.0%
10/15/2021 2,594 191 0.0%
10/14/2021 2,825 184 0.0%
10/13/2021 3,880 228 0.0%
10/12/2021 3,557 159 0.0%
10/11/2021 4,135 185 0.0%
10/10/2021 1,314 80 0.0%
10/9/2021 1,780 104 0.0%
10/8/2021 2,487 197 0.0%
10/7/2021 3,444 210 0.0%
10/6/2021 3,256 209 0.0%
10/5/2021 2,523 177 0.0%
10/4/2021 3,064 267 0.0%
10/3/2021 924 61 0.0%
10/2/2021 1,453 143 0.0%
10/1/2021 2,689 231 0.0%
9/30/2021 2,618 218 0.0%
9/29/2021 4,886 302 0.0%
9/28/2021 3,443 405 0.0%

Blocks from cox.net

No blocks during specified time frame

Bounces from cox.net

Message Count
550 5.1.1 Recipient address rejected: User does not exist. 4,126
Invalid:550-MailboxUnavailable 391
552 5.2.2 Quota exceeded 106
550 Outgoing mail from "" has been suspended. 55
535 Incorrect authentication data 4
552 5.2.0 sender rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 3
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. 2
421 cmsmtp too many sessions from 192.185.47.80. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 1
550 5.1.8 Access denied, bad outbound sender AS 1
452 4.1.0 server temporarily unavailable. 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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