My old Cox email settings stopped working
Replace them with Yahoo settings: incoming imap.mail.yahoo.com, port 993, SSL; outgoing smtp.mail.yahoo.com, port 465 or 587, SSL; and use a Yahoo app password.
Cox Email: Settings, Sign-In & Fixes
Cox no longer runs its own email: @cox.net mailboxes now live at Yahoo, and Yahoo handles all sign-in and account questions. Old Cox server names like imap.cox.net no longer work.
Covers @cox.net. Run by Yahoo, on behalf of Cox. Checked against Cox's own help pages, November 2026.
⚠️ Moved to a new system
Cox finished moving cox.net email to Yahoo Mail in early 2025. You keep your @cox.net address, but you now sign in at Yahoo Mail with the password you created during the move, and every mail app must be set up again with Yahoo settings. Cox has not created new email accounts since August 15, 2019.
Cox email server settings
| Server | Address | Port | Security |
|---|---|---|---|
| Incoming (IMAP) | imap.mail.yahoo.com | 993 | SSL/TLS |
| Incoming (POP) | pop.mail.yahoo.com | 995 | SSL/TLS |
| Outgoing (SMTP) | smtp.mail.yahoo.com | 465 | SSL/TLS |
- Username: Your full @cox.net email address
- Password: Mail apps need a Yahoo app password, made in your Yahoo account security settings, instead of your normal password.
- Use IMAP if you read mail on more than one device; POP downloads mail to one device only.
Official page: Cox email settings
Email still not working?
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Common Cox email problems
I forgot my Cox email password after the move
Use Yahoo account recovery at recovery.yahoo.com. The Cox sign-in page cannot reset it any more.
Email works on one device but not the others
Each phone, tablet and computer needs its settings changed to Yahoo. You only had to do the Yahoo move itself once.
Cox told me to ask Yahoo about my email
That is correct: Cox no longer handles email questions. Use Yahoo Help for your @cox.net account.
Can I keep my cox.net address and move to Gmail?
No. The @cox.net address can only be kept at Yahoo. Moving to another provider means getting a new address.
Problems that look the same on every provider
Can't sign in, or the password stopped working
- Sign in on the provider's own webmail page first. If that works, the problem is your mail app, not the account.
- If webmail rejects the password, use the provider's "Forgot password" page. Never use a reset link from an email you did not ask for.
- Many providers now need a separate app password (or their own sign-in screen) for Outlook, Apple Mail and phone apps. Your normal password will not work there.
Not receiving emails
- Check Spam, Junk and any filters or "blocked senders" in webmail.
- Check whether the mailbox is full; most providers stop accepting mail at the storage limit.
- If your app shows nothing new but webmail does, remove and re-add the account in the app using IMAP.
Can't send, or emails are stuck in the Outbox
- Check the outgoing (SMTP) server, port and security on this page against your app; old guides often list ports that no longer work.
- Turn on "My outgoing server requires authentication" and use the same username and password as incoming.
- Large attachments are a common cause. Remove the attachment and try again.
Contacts are getting spam from my address
- Change the password from webmail, then sign out of all other sessions if the provider offers it.
- Check forwarding rules, filters and the reply-to address in settings; attackers often add a hidden forward.
- Turn on two-step verification, and update the password anywhere else you used the same one.
Setting it up on a new phone or computer
- Use IMAP rather than POP so mail stays in sync across your phone, computer and webmail.
- Enter your full email address as the username unless the provider says otherwise.
- If the app offers the provider by name (Yahoo, Google, Outlook), choose that instead of "Other".
Sources: Cox: cox.net email moving to Yahoo · Cox: helpful tips on the move to Yahoo · Yahoo help: IMAP server settings · Yahoo help: POP access settings. Providers change settings from time to time; their own page is the final word.
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