Title: Yahoo Email
Last modified: November 19, 2025

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# Yahoo Email

 *  Resolved [allypitman](https://wordpress.org/support/users/allypitman/)
 * (@allypitman)
 * [6 months ago](https://wordpress.org/support/topic/yahoo-email/)
 * An email sent through POST SMTP (reset password) to a person with a yahoo.co.
   uk address has bounced back to me. But it has been logged as sent successfully
   in the Post SMTP log records.
 * What setting do I need to change to make sure these, and all other email are 
   being sent correctly?
 * thanks, Alison

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Support [M Aqib Khan](https://wordpress.org/support/users/aqibkhan9/)
 * (@aqibkhan9)
 * [5 months, 4 weeks ago](https://wordpress.org/support/topic/yahoo-email/#post-18726337)
 * Hello [@allypitman](https://wordpress.org/support/users/allypitman/) ,
 * Thank you for your message.
 * Post SMTP shows the email as “Sent Successfully” because your mail service accepted
   the message without any errors. However, Yahoo performed its own checks afterward
   and bounced the email, which happens outside Post SMTP’s control.
 * A bounce from Yahoo typically indicates issues such as:
    - SPF/DKIM/DMARC not fully aligned
    - The “From Email” not matching the authenticated domain
    - Yahoo filtering or blocking the sending IP/domain
 * To identify the exact cause, please share the bounce message you received. That
   will tell us precisely why Yahoo rejected it and how to fix it.
 * Happy to help you resolve this.
   Support Team – WP Experts
 *  Thread Starter [allypitman](https://wordpress.org/support/users/allypitman/)
 * (@allypitman)
 * [5 months, 4 weeks ago](https://wordpress.org/support/topic/yahoo-email/#post-18726928)
 * the bounce back email had this message (I’ve taken out the persons email:
 * the email address
      host [smtp-relay-float.mail.stackcp.net](http://smtp-relay-float.mail.stackcp.net/)[
   10.4.0.246]   SMTP error from remote mail server after RCPT TO:<email address
   >:   550-“Please enable DKIM for your domain. Yahoo requires all senders to  
   550 authenticate with DKIM – [https://senders.yahooinc.com/best-practices/](https://senders.yahooinc.com/best-practices/)“
   Reporting-MTA: dns; [smtp1.lhr.stackcp.net](http://smtp1.lhr.stackcp.net/)
 * Action: failed
   Final-Recipient: rfc822; the email addressStatus: 5.0.0Remote-
   MTA: dns; [smtp-relay-float.mail.stackcp.net](http://smtp-relay-float.mail.stackcp.net/)
   Diagnostic-Code: smtp; 550-“Please enable DKIM for your domain. Yahoo requires
   all senders to550 authenticate with DKIM – [https://senders.yahooinc.com/best-practices/](https://senders.yahooinc.com/best-practices/)“
 * But further emails sent, have been received by the intended recipient
 *  Plugin Support [M Aqib Khan](https://wordpress.org/support/users/aqibkhan9/)
 * (@aqibkhan9)
 * [5 months, 4 weeks ago](https://wordpress.org/support/topic/yahoo-email/#post-18727574)
 * Hello [@allypitman](https://wordpress.org/support/users/allypitman/) ,
 * Thank you for sharing the bounce details.
 * Yahoo rejected that specific message because your domain did not have DKIM enabled
   or passing at the time the email was sent:
 * > **550: “Please enable DKIM for your domain. Yahoo requires all senders to authenticate
   > with DKIM.”**
 * This means the receiving server checked your DKIM signature and didn’t find a
   valid one, so it blocked the message.
 * The fact that later emails were delivered successfully indicates that:
    - DKIM was enabled or fixed shortly after
      or
    - Your mail provider began signing messages correctly again
 * So the issue was most likely temporary, either DNS propagation or the server 
   not signing that particular message at the time it was sent.
 * If everything is working now, no further action is needed.
 * Warm regards,
   Support Team – WP Experts

Viewing 3 replies - 1 through 3 (of 3 total)

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## Tags

 * [yahoo](https://wordpress.org/support/topic-tag/yahoo/)

 * 3 replies
 * 2 participants
 * Last reply from: [M Aqib Khan](https://wordpress.org/support/users/aqibkhan9/)
 * Last activity: [5 months, 4 weeks ago](https://wordpress.org/support/topic/yahoo-email/#post-18727574)
 * Status: resolved