Title: Reason 550 Verification failed? Last modified: April 7, 2017 --- # Reason 550 Verification failed? * Resolved [luxman](https://wordpress.org/support/users/luxman/) * (@luxman) * [9 years, 3 months ago](https://wordpress.org/support/topic/reason-550-verification-failed/) * Not sure what’s going on here… I tried the test within settings page and it works. I try reset password email and it works. I then try to register via GravityForms registration addon and the emails do not go through. * I see the error message saying: * Email [blank@blank.com](https://wordpress.org/support/topic/reason-550-verification-failed/blank@blank.com?output_format=md) Reason 550 Verification failed for No Such User Here Sender verify failed Category wp_sendgrid_plugin * why would this be happening here? why is it trying to connect the users email to the subdomain or a site? Viewing 2 replies - 1 through 2 (of 2 total) * Thread Starter [luxman](https://wordpress.org/support/users/luxman/) * (@luxman) * [9 years, 3 months ago](https://wordpress.org/support/topic/reason-550-verification-failed/#post-9008215) * Horrible support. Moved to a different company. * Anonymous User 12640152 * (@anonymized-12640152) * [9 years, 2 months ago](https://wordpress.org/support/topic/reason-550-verification-failed/#post-9027410) * Hello. * We apologize for not meeting your expectations. * As you said, you have installed the SendGrid plugin and the emails being sent work. Emails stop working when sending with GravityForms. This would indicate that the issue may be caused by GravityForms. We would suggest contacting their support forum. * This support forum is mainly used to communicate with the development team of this plugin. For official SendGrid support contact us through [https://support.sendgrid.com/](https://support.sendgrid.com/) * Thanks, SendGrid Viewing 2 replies - 1 through 2 (of 2 total) The topic ‘Reason 550 Verification failed?’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/sendgrid-email-delivery-simplified_264460. svg) * [SendGrid](https://wordpress.org/plugins/sendgrid-email-delivery-simplified/) * [Frequently Asked Questions](https://wordpress.org/plugins/sendgrid-email-delivery-simplified/#faq) * [Support Threads](https://wordpress.org/support/plugin/sendgrid-email-delivery-simplified/) * [Active Topics](https://wordpress.org/support/plugin/sendgrid-email-delivery-simplified/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/sendgrid-email-delivery-simplified/unresolved/) * [Reviews](https://wordpress.org/support/plugin/sendgrid-email-delivery-simplified/reviews/) * 2 replies * 2 participants * Last reply from: Anonymous User 12640152 * Last activity: [9 years, 2 months ago](https://wordpress.org/support/topic/reason-550-verification-failed/#post-9027410) * Status: resolved