Title: Exception Code = 550 Last modified: June 22, 2021 --- # Exception Code = 550 * Resolved [Gerdski](https://wordpress.org/support/users/gerdski/) * (@gerdski) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/) * Hello, * since installing the Plugin in Our WooCommerce-Shop, we get many errors in this Form: * — ERROR PostmanWpMail: Exception code=550 message=You are not allowed to use the domain web.de as DATA From domain. — * This happens when customers of the shop have a web.de eMail address (which is very common in Germany), also the Shop owner has one. Probably the FROM address comes from the customer settings in WooCommerce. * What can we do about that? * Thanks! Viewing 13 replies - 1 through 13 (of 13 total) * [Tim](https://wordpress.org/support/users/tneville/) * (@tneville) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14584806) * Hi [@gerdski](https://wordpress.org/support/users/gerdski/), * Unfortunately this is an issue with your configuration, not the plugin. The 550 error is produced by your SMTP server. * Please paste a copy of your Post SMTP diagnostics log here, and we will try to advise what is not configured correctly. * Kind Regards, Tim * Thread Starter [Gerdski](https://wordpress.org/support/users/gerdski/) * (@gerdski) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14586157) * Hi, * ok, here is the log: * — Mailer: postsmtp HostName: mydomain.com cURL Version: 7.64.0 OpenSSL Version: OpenSSL/1.1.1d OS: Linux wp490 4.14.132-xenu-he #1 SMP Fri Dec 13 09:08:45 UTC 2019 x86_64 PHP: Linux 7.4.14-he.0 en_US.UTF-8 PHP Dependencies: iconv=Yes, spl_autoload =Yes, openssl=Yes, sockets=Yes, allow_url_fopen=No, mcrypt=No, zlib_encode=Yes WordPress: 5.7.2 de_DE UTF-8 WordPress Theme: Shop Isle WordPress Plugins: Antispam Bee, ARI Adminer, BackWPup, Cachify, Classic Editor, Disable Comments, Dynamic Pricing and Discounts for WooCommerce Basic Version, Heartbeat Control by WP Rocket, Local Fonts, VarkTech Minimum Purchase for WooCommerce, Popup by Supsystic, Post SMTP, Products Purchase Limit for WooCommerce, Simple History, Statify, Sucuri Security – Auditing, Malware Scanner and Hardening, Ultimate Member, PayPal PLUS for WooCommerce, WooCommerce Advanced Free Shipping, WooCommerce PayPal Checkout Gateway, Germanized for WooCommerce, WooCommerce PDF Invoices & Packing Slips, WooCommerce, Yoast SEO, WPFront Notification Bar, YITH WooCommerce Custom Order Status WordPress wp_mail Owner: /is/htdocs/wp10676469_0PVIUEJYNU/www/woo/ 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: 2.0.23 Postman Sender Domain (Envelope|Message): mydomain.com | mydomain.com Postman Prevent Message Sender Override (Email|Name): No | No Postman Active Transport: SMTP (smtp:tls:plain://wp10676469.mailout.server- he.de:587) Postman Active Transport Status (Ready|Connected): Yes | Yes Postman Deliveries (Success|Fail): 23 | 64 Postman File Locking (Enabled|Temp Dir): No | /tmp` — * [Tim](https://wordpress.org/support/users/tneville/) * (@tneville) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14592289) * Hi [@gerdski](https://wordpress.org/support/users/gerdski/), * You could try swapping the authentication from ‘Plain’ to ‘Login’. Otherwise, you need to speak with your hosting provider about this error as their SMTP server is throwing it. * Kind Regards, Tim * Thread Starter [Gerdski](https://wordpress.org/support/users/gerdski/) * (@gerdski) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14592316) * OK, thanks…I changed that. Now I’ll wait and see what happens… * [Tim](https://wordpress.org/support/users/tneville/) * (@tneville) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14592318) * Hi [@gerdski](https://wordpress.org/support/users/gerdski/), * Okay, great. Do test emails send okay? * Kind Regards, Tim * Thread Starter [Gerdski](https://wordpress.org/support/users/gerdski/) * (@gerdski) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14592366) * Just checked. Test emails are ok, but there was just on e email that returned the same error. * In the setting “Envelope Sender email address” we have “shop@ourshop.eu”, and this is the account for the Authentication Data. * Ther Error says “You are not allowed to use the domain web.de as DATA From domain.” * This is a different address/domain. I believe it comes from WooCommerce’s mail settings, there is this address “shopowner@web.de” (the shop owner’s private address” in the FROM field. * Maybe the Postman Settings take this address for his FROM, this would explain the error. * Would there be a possibility to change the FROM only in Postman, from [shopowner@web.de](https://wordpress.org/support/topic/exception-code-550/shopowner@web.de?output_format=md) to [shop@ourshop.eu](https://wordpress.org/support/topic/exception-code-550/shop@ourshop.eu?output_format=md)? * Thanks! * [Tim](https://wordpress.org/support/users/tneville/) * (@tneville) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14592428) * Hi [@gerdski](https://wordpress.org/support/users/gerdski/), * You must send as the user you are authenticating as. * If you are authenticating as [shopowner@web.de](https://wordpress.org/support/topic/exception-code-550/shopowner@web.de?output_format=md), you should set your envelope-from to [shopowner@web.de](https://wordpress.org/support/topic/exception-code-550/shopowner@web.de?output_format=md) too. * You should not “spoof” an address by changing the envelope-from in Post SMTP – this will lead to many deliverability issues. * Check out SPF, you will face issues with that too. * Kind Regards, Tim * Thread Starter [Gerdski](https://wordpress.org/support/users/gerdski/) * (@gerdski) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14592646) * This makes sense, thank you. * (Strange that without using Postman this was never an issue…) * …I will check that… * [Tim](https://wordpress.org/support/users/tneville/) * (@tneville) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14593961) * Okay, please let us know how you get on. * Kind Regards, Tim * Thread Starter [Gerdski](https://wordpress.org/support/users/gerdski/) * (@gerdski) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14597952) * Helo, * that was the solution. We changed the FROM Address to become the same as with which SMTP Postman logged on…and then it worked. * Thanks a lot! * [Tim](https://wordpress.org/support/users/tneville/) * (@tneville) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14609032) * Hi [@gerdski](https://wordpress.org/support/users/gerdski/), * No problem, it is really important to do that to get the best deliverability. 🙂 * Kind Regards, Tim * Thread Starter [Gerdski](https://wordpress.org/support/users/gerdski/) * (@gerdski) * [4 years, 11 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14610902) * It has worked 🙂 * (I just wonder why things were competely different without your plugin…ordinary mails were fine, but the Backup Plugin could not send a mail, that’s why we installed your plugin…) * [Tim](https://wordpress.org/support/users/tneville/) * (@tneville) * [4 years, 10 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14657611) * Hi [@gerdski](https://wordpress.org/support/users/gerdski/), * That is strange, as I say, it’s not normal practice to set it up your original way anyway – but glad all is okay now. * Kind Regards, Tim Viewing 13 replies - 1 through 13 (of 13 total) The topic ‘Exception Code = 550’ 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/) * 13 replies * 2 participants * Last reply from: [Tim](https://wordpress.org/support/users/tneville/) * Last activity: [4 years, 10 months ago](https://wordpress.org/support/topic/exception-code-550/#post-14657611) * Status: resolved