![Solution: NDR Error "550 5.4.1 Recipient address rejected: Access denied" for one user - Exchange Office 365 Hybrid - TechLabs Solution: NDR Error "550 5.4.1 Recipient address rejected: Access denied" for one user - Exchange Office 365 Hybrid - TechLabs](https://techlabs.blog/images/easyblog_articles/88/b2ap3_large_550-5.4.1-recipient-address-rejected.png)
Solution: NDR Error "550 5.4.1 Recipient address rejected: Access denied" for one user - Exchange Office 365 Hybrid - TechLabs
![How to correct 554 5.7.1 : Relay access denied email errors, and prevent them in the future | Server Sitters How to correct 554 5.7.1 : Relay access denied email errors, and prevent them in the future | Server Sitters](https://serversitters.com/wp-content/themes/SS-Mobile/images/server-sitters-logo.png)
How to correct 554 5.7.1 : Relay access denied email errors, and prevent them in the future | Server Sitters
Question: SMTP error 554 5.7.1 "Client host rejected: Access denied" · Issue #1012 · mattermost/mattermost-server · GitHub
![Non-Delivery Report: [550 5.4.1 Recipient address rejected: Access denied] – Exclaimer Cloud Knowledge Base Non-Delivery Report: [550 5.4.1 Recipient address rejected: Access denied] – Exclaimer Cloud Knowledge Base](https://exclaimerkbimages.blob.core.windows.net/images/Exclaimer%20Cloud/Signature%20Rules/NDR_MSActiveDirectory_OptiionalFeatures.png)
Non-Delivery Report: [550 5.4.1 Recipient address rejected: Access denied] – Exclaimer Cloud Knowledge Base
![Non-Delivery Report: [550 5.4.1 Recipient address rejected: Access denied] – Exclaimer Cloud Knowledge Base Non-Delivery Report: [550 5.4.1 Recipient address rejected: Access denied] – Exclaimer Cloud Knowledge Base](https://exclaimerkbimages.blob.core.windows.net/images/Exclaimer%20Cloud/New%20UI/MailRouting4.png)