Title: 5.5.1 authorization failed
Last modified: February 24, 2022

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# 5.5.1 authorization failed

 *  [laurajacob1986](https://wordpress.org/support/users/laurajacob1986/)
 * (@laurajacob1986)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/5-5-1-authorization-failed/)
 * Hi there,
 * Since november 2021 on one of our clients site Postman SMTP suddenly stopped 
   working. It gives the error ‘5.5.1 authorization failed’, even though nothing
   is changed and our client is 100% sure all the information they put in is correct.
 * What can the problem be? Is the problem at the domainname host or the webhost?
 * I’ll post the diagnostic info here as well:
 *     ```
       Mailer: postsmtp
       HostName: despreng-academie.nl
       cURL Version: 7.66.0
       OpenSSL Version: OpenSSL/1.1.1l-fips
       OS: Linux c70886.sgvps.net 3.12.18-clouder0 #1 SMP PREEMPT Wed Jun 9 16:10:01 EEST 2021 x86_64
       PHP: Linux 7.4.28 C
       PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=No, zlib_encode=Yes
       WordPress: 5.9.1 nl_NL UTF-8
       WordPress Theme: FlowAcademy Theme
       WordPress Plugins: Gravity Forms, Admin Page Spider Pro Pack, Astra Pro, Beaver Builder Plugin (Agency Version), Beaver Themer, Ultimate Addons for Beaver Builder, PowerPack for Beaver Builder, Better Search Replace, Beaver Team Pro, CartFlows Pro, CartFlows, Complianz Privacy Suite (GDPR/CCPA) premium, Gravity Forms Mailchimp Add-On, Imsanity, iThemes Security Pro, LifterLMS Helper, LifterLMS WooCommerce, LifterLMS Labs, LifterLMS, Loco Translate, LoginPress - Auto Login, LoginPress Pro, LoginPress - Customizing the WordPress Login Screen., MainWP Child, Mollie Payments for WooCommerce, Post SMTP, SiteGround Optimizer, ShortPixel Image Optimizer, UpdraftPlus - Backup/Restore, User Role Editor Pro, WC-AC Hook, WooCommerce PDF Invoices & Packing Slips, WooCommerce Subscriptions, WooCommerce, WP Fusion, WP Rocket, WP Rollback, SEOPress PRO, SEOPress
       WordPress wp_mail Owner: /home/customer/www/despreng-academie.nl/public_html/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
       WordPress wp_mail Filter(s): wp_staticize_emoji_for_email, WPO\WC\PDF_Invoices\Main->set_phpmailer_validator, PostsmtpMailer->get_mail_args
       WordPress phpmailer_init Action(s): PostsmtpMailer->phpmailer_smtp_init
       Postman: 2.0.24
       Postman Sender Domain (Envelope|Message): centrumdespreng.nl | centrumdespreng.nl
       Postman Prevent Message Sender Override (Email|Name): No | No
       Postman Active Transport: SMTP (smtp:tls:plain://web1.jointartistic.com:25)
       Postman Active Transport Status (Ready|Connected): Yes | Yes
       Postman Deliveries (Success|Fail): 781 | 449
       ```
   
 * Thanks in advance!

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [A.Tariq](https://wordpress.org/support/users/arsalantariq/)
 * (@arsalantariq)
 * [4 years, 2 months ago](https://wordpress.org/support/topic/5-5-1-authorization-failed/#post-15402855)
 * Hi [@laurajacob1986](https://wordpress.org/support/users/laurajacob1986/) ,
 * Hope you are doing good.
 * let me look into this, Also we are working on updates and fixes and will release
   our updated version asap.
 * Thanks`
 *  Plugin Support [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * (@haseeb0001)
 * [3 years, 11 months ago](https://wordpress.org/support/topic/5-5-1-authorization-failed/#post-15736352)
 * [@laurajacob1986](https://wordpress.org/support/users/laurajacob1986/)
 * Kindly update the plugin to this version 2.1.1, this may resolve the issue.
 * Thanks

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘5.5.1 authorization failed’ 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/)

 * 2 replies
 * 3 participants
 * Last reply from: [M Haseeb](https://wordpress.org/support/users/haseeb0001/)
 * Last activity: [3 years, 11 months ago](https://wordpress.org/support/topic/5-5-1-authorization-failed/#post-15736352)
 * Status: not resolved