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: 5,057,607

Open Rate to cox.net: 439,782 (8.7%)

Date range:
Display as:

Sent vs Opens for cox.net

Date Sent Opens Open Rate
5/18/2022 3,560 266 0.0%
5/17/2022 2,891 278 0.0%
5/16/2022 2,919 281 0.0%
5/15/2022 1,436 86 0.0%
5/14/2022 2,454 251 0.0%
5/13/2022 3,111 464 0.0%
5/11/2022 3,805 380 0.0%
5/10/2022 3,512 303 0.0%
5/9/2022 3,606 331 0.0%
5/8/2022 1,851 145 0.0%
5/7/2022 2,013 177 0.0%
5/6/2022 3,075 289 0.0%
5/5/2022 3,059 338 0.0%
5/4/2022 4,163 466 0.0%
5/3/2022 3,998 464 0.0%
5/2/2022 3,782 424 0.0%
5/1/2022 1,634 158 0.0%
4/30/2022 1,724 178 0.0%
4/29/2022 2,969 447 0.0%
4/28/2022 3,267 306 0.0%
4/27/2022 3,856 382 0.0%
4/26/2022 2,648 320 0.0%
4/25/2022 3,549 380 0.0%
4/24/2022 2,628 214 0.0%
4/23/2022 2,857 319 0.0%
4/22/2022 3,705 499 0.0%
4/21/2022 3,545 404 0.0%
4/20/2022 4,241 346 0.0%
4/19/2022 3,782 431 0.0%
4/18/2022 3,337 460 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. 4,242
Invalid:550-MailboxUnavailable 1,328
552 5.2.2 Quota exceeded 59
Email was deferred due to the following reason: 15
552 message rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 11
421 4.2.0 sender rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 5
534-5.7.9 Application-specific password required. 3
421 cmsmtp 149.72.54.131 service temporarily unavailable. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 3
421 cmsmtp 149.72.32.175 service temporarily unavailable. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 2
421 cmsmtp 149.72.32.168 service temporarily unavailable. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 2
Temporary System Problem. Try again later. 2
421 cmsmtp 149.72.34.116 service temporarily unavailable. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 1
421 4.2.0 Message accepted for delivery AUP#CXPOL 1
421 cmsmtp 149.72.167.178 service temporarily unavailable. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 1
421 cmsmtp too many sessions from 149.72.32.175. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 1
421 cmsmtp 167.89.16.17 is listed on Cloudmark Please visit https://csi.cloudmark.com/en/reset?ip=167.89.16.17 1
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.210.171 1
SMTP; 550 5.1.1 Recipient address rejected: User does not exist. 1
The recipient server did not accept our requests to connect. 1
550 recipient rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 1
421 4.1.0 server temporarily unavailable. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 1
Connection reset by peer 1
421 cmsmtp 149.72.34.12 service 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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