When did Cox.net change their MX records?

4 Marketer opinions 2 Expert opinions 3 Technical articles 3 Resources

Summary

Cox Communications transitioned its email services to Yahoo Mail around October 1, 2023. This change required updating email authentication configurations to ensure deliverability to Cox.net recipients. Multiple sources confirm the transition and that Cox.net MX records are now managed by Yahoo, using specific Yahoo MX records.

Key findings

MX Record Change Date: Cox.net MX records were updated around October 1, 2023.
Transition to Yahoo: Cox Communications transitioned its email services to Yahoo Mail.
Yahoo MX Records in Use: Cox.net now uses Yahoo's MX records (e.g., mx1.mail.yahoo.com, mx-eu.mail.am0.yahoodns.net).

Key considerations

Authentication Updates: Senders must update their email authentication settings (SPF, DKIM, DMARC) to align with Yahoo's policies to maintain deliverability to Cox.net addresses.
Deliverability Impact: Failure to update authentication configurations may negatively impact email deliverability to Cox.net recipients.
User Awareness: Cox users should consult Cox's support page for details on how the transition affects them.

What email marketers say
4Marketer opinions

Cox Communications changed their MX records to point to Yahoo around October 1, 2023. This transition involved migrating Cox.net email services to Yahoo's infrastructure.

Key opinions

MX Record Change Date: Cox.net MX records were updated around October 1, 2023.
Transition to Yahoo: Cox Communications transitioned its email services to Yahoo.

Key considerations

Authentication Updates: Senders need to update their email authentication configurations (SPF, DKIM, DMARC) to align with Yahoo's policies to ensure proper email deliverability to Cox.net recipients.
Deliverability Impact: The transition may impact email deliverability for senders who haven't updated their authentication settings.

Marketer view

Email marketer from Cox Support mentions that they are migrating their email to Yahoo.

February 2024 - Cox Forums

Marketer view

Email marketer from Reddit responds that Cox changed their MX records around October 1, 2023, based on their email client.

May 2021 - Reddit

Marketer view

Marketer from Email Geeks answers that the Cox.net MX records changed precisely on 10/1.

August 2022 - Email Geeks

Marketer view

Email marketer from Reddit shares a link pointing to the fact that Cox is transitioning their email to Yahoo.

June 2024 - Reddit

What the experts say
2Expert opinions

Cox Communications transitioned their email service to Yahoo, requiring an update to email authentication configurations to ensure deliverability to Cox.net recipients. The MX record change occurred sometime in October of 2023.

Key opinions

Transition to Yahoo: Cox Communications transitioned its email service to Yahoo.
Authentication Update: The transition necessitates updating email authentication configurations (SPF, DKIM, DMARC) to align with Yahoo's policies.
MX Record Change Timeline: The change in MX records happened sometime in October 2023.

Key considerations

Deliverability Impact: Failure to update authentication configurations may negatively impact email deliverability to Cox.net recipients.
Authentication Policies: Senders should review and adhere to Yahoo's authentication policies to ensure proper delivery to Cox.net email addresses.

Expert view

Expert from Email Geeks answers that the Cox.net MX records changed sometime this month, as prior monthly MX logging shows the old MX.

October 2023 - Email Geeks

Expert view

Expert from Word to the Wise discusses Cox Communications transitioning its email service to Yahoo, which impacts email authentication and deliverability. This change requires senders to update their authentication configurations to align with Yahoo's policies to ensure messages are properly delivered to Cox.net recipients.

April 2021 - Word to the Wise

What the documentation says
3Technical articles

Cox Communications transitioned its email services to Yahoo Mail. DNSWatch and MXToolbox confirm that Cox.net MX records are now managed by Yahoo, using MX records such as mx1.mail.yahoo.com, mx2.mail.yahoo.com, mx-eu.mail.am0.yahoodns.net, and mx-us.mail.am0.yahoodns.net. Cox provides a support page detailing the transition process and its impact on users.

Key findings

Yahoo Mail Transition: Cox Communications has transitioned its email services to Yahoo Mail.
MX Records Managed by Yahoo: Cox.net MX records are now managed by Yahoo.
Yahoo MX Records in Use: Cox.net uses Yahoo's MX records, including mx1.mail.yahoo.com, mx2.mail.yahoo.com, mx-eu.mail.am0.yahoodns.net, and mx-us.mail.am0.yahoodns.net.

Key considerations

User Impact: Users should consult Cox's support page for details on how the transition impacts them.
Email Deliverability: Senders should ensure their email configurations are compatible with Yahoo Mail's requirements to maintain deliverability to Cox.net addresses.

Technical article

Documentation from Cox explains that Cox is transitioning email services to Yahoo Mail, providing a support page with details on the transition process and impact on users.

February 2024 - Cox.com

Technical article

Documentation from DNSWatch shows that Cox.net currently uses Yahoo's MX records. The MX records listed include mx1.mail.yahoo.com and mx2.mail.yahoo.com.

September 2024 - DNSWatch.com

Technical article

Documentation from MXToolbox shows that Cox.net MX records are managed by Yahoo. The MX records include domains like mx-eu.mail.am0.yahoodns.net, mx-us.mail.am0.yahoodns.net.

December 2023 - MXToolbox.com

Switch from Yahoo mail - eM Client

Cox communications sold their email to Yahoo. Yahoo selectively sends about half of my email to the Junkbox especially ALL of the emails from one political party perspective. I want to switch from Yahoo but want another service compatible with eMClient. I’m assuming I will have to change my email address from cox.net (not something I want to do because of notifying all my correspondents). I have been looking at Proton, but I do want some emails from businesses where I shop and it appears tha...

eM Client

MX records deleted - DNS & Network - Cloudflare Community

I am not getting any emails. Please help me. Apparently, I need some MX records deleted, then added. I can be someone please call me? ~{redacted - please do not share full name, origin ip address, email address, credit card information, phone number and/or any other personally identifiable information}

Cloudflare Community