Title: Temporary authentication failure
Last modified: April 14, 2022

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# Temporary authentication failure

 *  Resolved [jerrystewart99](https://wordpress.org/support/users/jerrystewart99/)
 * (@jerrystewart99)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/temporary-authentication-failure/)
 * Hi, I’m getting an intermittent authentication error when sending emails from
   my WordPress site using postSMTP. The failure appears random. Approximately 1
   in 20 emails fails to send, but I do get an email notifying me of the error.
   
   The notification email is:
 *     ```
       You getting this message because an error detected while delivered your email.
       For the domain: https://panza.org.nz
       The log to paste when you open a support issue:
       4.7.0 Temporary authentication failure: Connection lost to authentication server
       ```
   
 * My hosting (and email) provider is Hostinger (Premium Shared Hosting)
 * In postSMTP I’ve tried using different authentication types. Both `Plain` and`
   Login` work initially but both fail intermittently.
 * I suspect that this is an issue with Hostinger rather than postSMTP but I wonder
   if anyone has any experience with this issue and what I should be raising with
   Hostinger. Their help desk has not been helpful so far.
 * Thanks,
    – Jerry
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ftemporary-authentication-failure%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 5 replies - 1 through 5 (of 5 total)

 *  [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * (@haseeb0001)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/temporary-authentication-failure/#post-15564046)
 * Hi [@jerrystewart99](https://wordpress.org/support/users/jerrystewart99/)
 * Hope you are doing good.
 * This issue is from the hosting side, Connection lost to authentication server
   mean your email server is not properly responding so you have to talk to your
   hosting support or change the hosting server then test it.
 * Thanks
 *  [Martín](https://wordpress.org/support/users/caparros07/)
 * (@caparros07)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/temporary-authentication-failure/#post-15565698)
 * Same here with all my Hostinger accounts. Any solution of your Hostinger support?
   They say everything is fine
 *  Thread Starter [jerrystewart99](https://wordpress.org/support/users/jerrystewart99/)
 * (@jerrystewart99)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/temporary-authentication-failure/#post-15566276)
 * Hi [@caparros07](https://wordpress.org/support/users/caparros07/)
 * Before I go back to Hostinger again, can I ask if you are using postSMTP as your
   email plugin?
    What is the frequency of fails are you getting?
 * thanks, Jerry
    -  This reply was modified 4 years, 1 month ago by [jerrystewart99](https://wordpress.org/support/users/jerrystewart99/).
 *  Thread Starter [jerrystewart99](https://wordpress.org/support/users/jerrystewart99/)
 * (@jerrystewart99)
 * [4 years ago](https://wordpress.org/support/topic/temporary-authentication-failure/#post-15671976)
 * Hostinger has been unable to solve my problem…
 * but I see that post SMTP now has a fallback (since v1.9.8)- the ability to set
   up a second delivery service if the first one fails. In my case the failures 
   are irregular and the emails are generally non-critical, so I’ve set up the fallback
   service to be the same as the primary.
 * A big thank you to postSMTP for a very useful feature.
 *  [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * (@haseeb0001)
 * [4 years ago](https://wordpress.org/support/topic/temporary-authentication-failure/#post-15672511)
 * [@jerrystewart99](https://wordpress.org/support/users/jerrystewart99/) Great,
   thanks for updating us 🙂

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Temporary authentication failure’ is closed to new replies.

 * ![](https://ps.w.org/post-smtp/assets/icon-128x128.gif?rev=3209655)
 * [Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App](https://wordpress.org/plugins/post-smtp/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/post-smtp/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/post-smtp/)
 * [Active Topics](https://wordpress.org/support/plugin/post-smtp/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/post-smtp/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/post-smtp/reviews/)

 * 5 replies
 * 3 participants
 * Last reply from: [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * Last activity: [4 years ago](https://wordpress.org/support/topic/temporary-authentication-failure/#post-15672511)
 * Status: resolved