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
2/4/2023 2,191 187 0.0%
2/3/2023 2,904 348 0.0%
2/2/2023 3,608 522 0.0%
2/1/2023 4,550 478 0.0%
1/31/2023 3,312 465 0.0%
1/30/2023 4,570 463 0.0%
1/29/2023 1,299 114 0.0%
1/28/2023 2,544 447 0.0%
1/27/2023 2,951 402 0.0%
1/26/2023 3,207 491 0.0%
1/25/2023 5,455 493 0.0%
1/24/2023 3,913 504 0.0%
1/23/2023 4,886 515 0.0%
1/22/2023 1,843 136 0.0%
1/21/2023 2,580 300 0.0%
1/20/2023 3,648 427 0.0%
1/19/2023 4,591 696 0.0%
1/18/2023 6,567 676 0.0%
1/17/2023 3,446 436 0.0%
1/16/2023 4,445 408 0.0%
1/15/2023 1,883 202 0.0%
1/14/2023 3,867 429 0.0%
1/13/2023 3,396 499 0.0%
1/12/2023 3,784 564 0.0%
1/11/2023 4,990 431 0.0%
1/10/2023 3,669 581 0.0%
1/9/2023 4,724 516 0.0%
1/8/2023 2,083 147 0.0%
1/7/2023 2,577 433 0.0%
1/6/2023 3,579 530 0.0%

Blocks from cox.net

No blocks during specified time frame

Bounces from cox.net

Explanation of bounce codes

Message Count
550 5.1.1 Recipient address rejected: User does not exist. 3,667
Invalid:550-MailboxUnavailable 2,115
Reached max queue time 68
NoMxRecord:0-0 67
552 5.2.2 Quota exceeded 59
552 5.2.0 internal error. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 8
552 message rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 8
552 5.2.0 sender rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html 3
SMTP; 550 5.1.1 Recipient address rejected: User does not exist. 2
554 cmsmtp 154.12.226.237 is listed on Cloudmark Please visit https://csi.cloudmark.com/en/reset?ip=154.12.226.237 2
551 SenderAuthorization: is not authorized to send emails to this service. 2
550 No such user here 1
The group has exceeded its quota for total number of bytes sent. 1
This email has been blocked due to PMF Policies. 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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