Title: Incorrect authentication data
Last modified: August 22, 2022

---

# Incorrect authentication data

 *  [jesska](https://wordpress.org/support/users/jesska/)
 * (@jesska)
 * [3 years, 9 months ago](https://wordpress.org/support/topic/incorrect-authentication-data-16/)
 * hey guys
    Since Friday all my websites using Post SMTP have all now gone offline
   and have an Incorrect authentication data error.
 * I have checked the SPF record was correct (still unchanged)
    I checked the the
   IP was correct I checked in the admin office365 account to make sure that Authenticated
   SMTP was enabled I checked the Restrict outgoing SMTP to root, Exim, and mailman(
   FKA SMTP Tweak) setting and it was already off I also added the websites IP to
   the white list for the CPHulk.
 * I reset the plugin and re logged in with a different client email. Still no success.
   Is anyone else having this issue?
    -  This topic was modified 3 years, 9 months ago by [jesska](https://wordpress.org/support/users/jesska/).

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

 *  Plugin Support [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * (@haseeb0001)
 * [3 years, 9 months ago](https://wordpress.org/support/topic/incorrect-authentication-data-16/#post-15938408)
 * [@jesska](https://wordpress.org/support/users/jesska/) Hi,
 * Hope you are doing good.
 * Did you try to reconfigure Office 365 with Post SMTP?
 * Share Email log Page screenshot (you can hide emails addresses)
 * Share the Diagnostic test report of Post SMTP.
 * About this is you can read our blog [here](https://postmansmtp.com/incorrect-authentication-data/#:~:text=Possible%20solutions%3A,of%20the%20server's%20cPHulk%20blacklist.).
 * Thanks
 *  Thread Starter [jesska](https://wordpress.org/support/users/jesska/)
 * (@jesska)
 * [3 years, 9 months ago](https://wordpress.org/support/topic/incorrect-authentication-data-16/#post-15940174)
 * Hi Haseeb,
 * Yes I am using Office 365 with post SMTP
 * It wont let me upload a screenshot 🙁
 * my settings are:
    SMTP PostSMTP smtp.office365.com 587 email address – 0365 one
   STARTTLS Login
 * then email and password info.
 * error comes up with ‘incorrect authentication data’ 🙁
 *  Plugin Support [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * (@haseeb0001)
 * [3 years, 9 months ago](https://wordpress.org/support/topic/incorrect-authentication-data-16/#post-15942362)
 * [@jesska](https://wordpress.org/support/users/jesska/)
 * Share a screenshot via we transfer.
 * Did you changed your Microsoft account pass? or try to reset the pass and add
   new Pass in Post SMTP and then test and let me know.
 * Thanks

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

The topic ‘Incorrect authentication data’ 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/)

 * 3 replies
 * 2 participants
 * Last reply from: [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * Last activity: [3 years, 9 months ago](https://wordpress.org/support/topic/incorrect-authentication-data-16/#post-15942362)
 * Status: not resolved